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Finding the Fourth Proportional to 663,702.50, 915,909.45 and 361,897.22

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Solution

The fourth proportional to 663,702.50, 915,909.45 and 361,897.22 is: 499,418.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,702.50 : 915,909.45 = 361,897.22 : x
  2. Step 2: Convert to fraction form
    663,702.50/915,909.45 = 361,897.22/x
  3. Step 3: Cross multiply
    663,702.50x = 915,909.45 × 361,897.22
  4. Step 4: Simplify right side
    663,702.50x = 331,465,083,726.73
  5. Step 5: Solve for x
    x = 331,465,083,726.73/663,702.50
  6. Step 6: Final answer
    x = 499,418.16

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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.