Home / 485,621.60-727,654.80-319,215.20

Finding the Fourth Proportional to 485,621.60, 727,654.80 and 319,215.20

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Solution

The fourth proportional to 485,621.60, 727,654.80 and 319,215.20 is: 478,311.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,621.60 : 727,654.80 = 319,215.20 : x
  2. Step 2: Convert to fraction form
    485,621.60/727,654.80 = 319,215.20/x
  3. Step 3: Cross multiply
    485,621.60x = 727,654.80 × 319,215.20
  4. Step 4: Simplify right side
    485,621.60x = 232,278,472,512.96
  5. Step 5: Solve for x
    x = 232,278,472,512.96/485,621.60
  6. Step 6: Final answer
    x = 478,311.66

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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.