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Finding the Fourth Proportional to 488,841.60, 674,695.98 and 318,780.48

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Solution

The fourth proportional to 488,841.60, 674,695.98 and 318,780.48 is: 439,978.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,841.60 : 674,695.98 = 318,780.48 : x
  2. Step 2: Convert to fraction form
    488,841.60/674,695.98 = 318,780.48/x
  3. Step 3: Cross multiply
    488,841.60x = 674,695.98 × 318,780.48
  4. Step 4: Simplify right side
    488,841.60x = 215,079,908,358.47
  5. Step 5: Solve for x
    x = 215,079,908,358.47/488,841.60
  6. Step 6: Final answer
    x = 439,978.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.