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Finding the Fourth Proportional to 663,897.40, 993,221.70 and 576,125.80

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Solution

The fourth proportional to 663,897.40, 993,221.70 and 576,125.80 is: 861,911.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,897.40 : 993,221.70 = 576,125.80 : x
  2. Step 2: Convert to fraction form
    663,897.40/993,221.70 = 576,125.80/x
  3. Step 3: Cross multiply
    663,897.40x = 993,221.70 × 576,125.80
  4. Step 4: Simplify right side
    663,897.40x = 572,220,646,489.86
  5. Step 5: Solve for x
    x = 572,220,646,489.86/663,897.40
  6. Step 6: Final answer
    x = 861,911.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.