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Finding the Fourth Proportional to 658,098.72, 987,023.52 and 320,800.56

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Solution

The fourth proportional to 658,098.72, 987,023.52 and 320,800.56 is: 481,140.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,098.72 : 987,023.52 = 320,800.56 : x
  2. Step 2: Convert to fraction form
    658,098.72/987,023.52 = 320,800.56/x
  3. Step 3: Cross multiply
    658,098.72x = 987,023.52 × 320,800.56
  4. Step 4: Simplify right side
    658,098.72x = 316,637,697,949.17
  5. Step 5: Solve for x
    x = 316,637,697,949.17/658,098.72
  6. Step 6: Final answer
    x = 481,140.12

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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.