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Finding the Fourth Proportional to 418,560.78, 577,899.14 and 280,946.11

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Solution

The fourth proportional to 418,560.78, 577,899.14 and 280,946.11 is: 387,897.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,560.78 : 577,899.14 = 280,946.11 : x
  2. Step 2: Convert to fraction form
    418,560.78/577,899.14 = 280,946.11/x
  3. Step 3: Cross multiply
    418,560.78x = 577,899.14 × 280,946.11
  4. Step 4: Simplify right side
    418,560.78x = 162,358,515,355.35
  5. Step 5: Solve for x
    x = 162,358,515,355.35/418,560.78
  6. Step 6: Final answer
    x = 387,897.11

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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.