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Finding the Fourth Proportional to 605,221.70, 907,832.55 and 392,645.30

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Solution

The fourth proportional to 605,221.70, 907,832.55 and 392,645.30 is: 588,967.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,221.70 : 907,832.55 = 392,645.30 : x
  2. Step 2: Convert to fraction form
    605,221.70/907,832.55 = 392,645.30/x
  3. Step 3: Cross multiply
    605,221.70x = 907,832.55 × 392,645.30
  4. Step 4: Simplify right side
    605,221.70x = 356,456,183,944.52
  5. Step 5: Solve for x
    x = 356,456,183,944.52/605,221.70
  6. Step 6: Final answer
    x = 588,967.95

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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.