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Finding the Fourth Proportional to 690,549.78, 953,006.61 and 418,629.14

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Solution

The fourth proportional to 690,549.78, 953,006.61 and 418,629.14 is: 577,737.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,549.78 : 953,006.61 = 418,629.14 : x
  2. Step 2: Convert to fraction form
    690,549.78/953,006.61 = 418,629.14/x
  3. Step 3: Cross multiply
    690,549.78x = 953,006.61 × 418,629.14
  4. Step 4: Simplify right side
    690,549.78x = 398,956,337,937.22
  5. Step 5: Solve for x
    x = 398,956,337,937.22/690,549.78
  6. Step 6: Final answer
    x = 577,737.26

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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.