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Finding the Third Proportional to 424,742 and 642,554

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Solution

The third proportional to 424,742 and 642,554 is: 972,062.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,742 : 642,554 = 642,554 : x
  2. Step 2: Convert to fraction form
    424,742/642,554 = 642,554/x
  3. Step 3: Cross multiply
    424,742x = 642,554 × 642,554
  4. Step 4: Simplify right side
    424,742x = 412,875,642,916
  5. Step 5: Solve for x
    x = 412,875,642,916/424,742
  6. Step 6: Final answer
    x = 972,062.20

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.