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Finding the Fourth Proportional to 605,708.20, 907,541.70 and 478,862.20

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Solution

The fourth proportional to 605,708.20, 907,541.70 and 478,862.20 is: 717,486.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,708.20 : 907,541.70 = 478,862.20 : x
  2. Step 2: Convert to fraction form
    605,708.20/907,541.70 = 478,862.20/x
  3. Step 3: Cross multiply
    605,708.20x = 907,541.70 × 478,862.20
  4. Step 4: Simplify right side
    605,708.20x = 434,587,415,053.74
  5. Step 5: Solve for x
    x = 434,587,415,053.74/605,708.20
  6. Step 6: Final answer
    x = 717,486.43

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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.