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Finding the Fourth Proportional to 690,397.80, 952,649.82 and 403,863.72

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Solution

The fourth proportional to 690,397.80, 952,649.82 and 403,863.72 is: 557,273.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,397.80 : 952,649.82 = 403,863.72 : x
  2. Step 2: Convert to fraction form
    690,397.80/952,649.82 = 403,863.72/x
  3. Step 3: Cross multiply
    690,397.80x = 952,649.82 × 403,863.72
  4. Step 4: Simplify right side
    690,397.80x = 384,740,700,162.53
  5. Step 5: Solve for x
    x = 384,740,700,162.53/690,397.80
  6. Step 6: Final answer
    x = 557,273.94

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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.