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Finding the Fourth Proportional to 661,778.92, 913,221.57 and 375,325.66

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Solution

The fourth proportional to 661,778.92, 913,221.57 and 375,325.66 is: 517,930.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,778.92 : 913,221.57 = 375,325.66 : x
  2. Step 2: Convert to fraction form
    661,778.92/913,221.57 = 375,325.66/x
  3. Step 3: Cross multiply
    661,778.92x = 913,221.57 × 375,325.66
  4. Step 4: Simplify right side
    661,778.92x = 342,755,488,486.49
  5. Step 5: Solve for x
    x = 342,755,488,486.49/661,778.92
  6. Step 6: Final answer
    x = 517,930.50

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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.