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Finding the Fourth Proportional to 478,861.20, 718,291.80 and 471,862.80

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Solution

The fourth proportional to 478,861.20, 718,291.80 and 471,862.80 is: 707,794.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,861.20 : 718,291.80 = 471,862.80 : x
  2. Step 2: Convert to fraction form
    478,861.20/718,291.80 = 471,862.80/x
  3. Step 3: Cross multiply
    478,861.20x = 718,291.80 × 471,862.80
  4. Step 4: Simplify right side
    478,861.20x = 338,935,179,965.04
  5. Step 5: Solve for x
    x = 338,935,179,965.04/478,861.20
  6. Step 6: Final answer
    x = 707,794.20

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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.