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Finding the Fourth Proportional to 478,519.20, 717,433.20 and 268,221.60

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Solution

The fourth proportional to 478,519.20, 717,433.20 and 268,221.60 is: 402,138.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,519.20 : 717,433.20 = 268,221.60 : x
  2. Step 2: Convert to fraction form
    478,519.20/717,433.20 = 268,221.60/x
  3. Step 3: Cross multiply
    478,519.20x = 717,433.20 × 268,221.60
  4. Step 4: Simplify right side
    478,519.20x = 192,431,080,797.12
  5. Step 5: Solve for x
    x = 192,431,080,797.12/478,519.20
  6. Step 6: Final answer
    x = 402,138.68

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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.