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Finding the Fourth Proportional to 605,709.20, 907,543.20 and 478,863.20

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Solution

The fourth proportional to 605,709.20, 907,543.20 and 478,863.20 is: 717,487.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,709.20 : 907,543.20 = 478,863.20 : x
  2. Step 2: Convert to fraction form
    605,709.20/907,543.20 = 478,863.20/x
  3. Step 3: Cross multiply
    605,709.20x = 907,543.20 × 478,863.20
  4. Step 4: Simplify right side
    605,709.20x = 434,589,040,890.24
  5. Step 5: Solve for x
    x = 434,589,040,890.24/605,709.20
  6. Step 6: Final answer
    x = 717,487.93

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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.