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Finding the Fourth Proportional to 605,722.20, 907,562.70 and 478,876.20

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Solution

The fourth proportional to 605,722.20, 907,562.70 and 478,876.20 is: 717,507.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,722.20 : 907,562.70 = 478,876.20 : x
  2. Step 2: Convert to fraction form
    605,722.20/907,562.70 = 478,876.20/x
  3. Step 3: Cross multiply
    605,722.20x = 907,562.70 × 478,876.20
  4. Step 4: Simplify right side
    605,722.20x = 434,610,177,037.74
  5. Step 5: Solve for x
    x = 434,610,177,037.74/605,722.20
  6. Step 6: Final answer
    x = 717,507.43

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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.