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Finding the Fourth Proportional to 690,718.69, 952,938.97 and 418,590.28

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Solution

The fourth proportional to 690,718.69, 952,938.97 and 418,590.28 is: 577,501.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,718.69 : 952,938.97 = 418,590.28 : x
  2. Step 2: Convert to fraction form
    690,718.69/952,938.97 = 418,590.28/x
  3. Step 3: Cross multiply
    690,718.69x = 952,938.97 × 418,590.28
  4. Step 4: Simplify right side
    690,718.69x = 398,890,990,275.21
  5. Step 5: Solve for x
    x = 398,890,990,275.21/690,718.69
  6. Step 6: Final answer
    x = 577,501.37

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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.