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Finding the Fourth Proportional to 1,309,334,039.79, 1,806,855,362.88 and 714,622,787.16

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Solution

The fourth proportional to 1,309,334,039.79, 1,806,855,362.88 and 714,622,787.16 is: 986,165,467.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309,334,039.79 : 1,806,855,362.88 = 714,622,787.16 : x
  2. Step 2: Convert to fraction form
    1,309,334,039.79/1,806,855,362.88 = 714,622,787.16/x
  3. Step 3: Cross multiply
    1,309,334,039.79x = 1,806,855,362.88 × 714,622,787.16
  4. Step 4: Simplify right side
    1,309,334,039.79x = 1,291,220,015,416,298,752
  5. Step 5: Solve for x
    x = 1,291,220,015,416,298,752/1,309,334,039.79
  6. Step 6: Final answer
    x = 986,165,467.46

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Double scale
Find fourth proportional to 1,309,334,040.79, 1,806,855,364.26 and 714,622,788.16
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.