Home / 1,247,562,816.72-1,721,568,480.54-682,938,471.12

Finding the Fourth Proportional to 1,247,562,816.72, 1,721,568,480.54 and 682,938,471.12

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Solution

The fourth proportional to 1,247,562,816.72, 1,721,568,480.54 and 682,938,471.12 is: 942,417,752.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247,562,816.72 : 1,721,568,480.54 = 682,938,471.12 : x
  2. Step 2: Convert to fraction form
    1,247,562,816.72/1,721,568,480.54 = 682,938,471.12/x
  3. Step 3: Cross multiply
    1,247,562,816.72x = 1,721,568,480.54 × 682,938,471.12
  4. Step 4: Simplify right side
    1,247,562,816.72x = 1,175,725,346,028,369,152
  5. Step 5: Solve for x
    x = 1,175,725,346,028,369,152/1,247,562,816.72
  6. Step 6: Final answer
    x = 942,417,752.65

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Double scale
Find fourth proportional to 1,247,562,817.72, 1,721,568,481.92 and 682,938,472.12
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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.