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Finding the Fourth Proportional to 643,805.40, 888,561.40 and 371,824.41

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Solution

The fourth proportional to 643,805.40, 888,561.40 and 371,824.41 is: 513,181.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,805.40 : 888,561.40 = 371,824.41 : x
  2. Step 2: Convert to fraction form
    643,805.40/888,561.40 = 371,824.41/x
  3. Step 3: Cross multiply
    643,805.40x = 888,561.40 × 371,824.41
  4. Step 4: Simplify right side
    643,805.40x = 330,388,818,303.77
  5. Step 5: Solve for x
    x = 330,388,818,303.77/643,805.40
  6. Step 6: Final answer
    x = 513,181.19

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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.