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Finding the Fourth Proportional to 518,229.76, 777,449.13 and 218,710.66

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Solution

The fourth proportional to 518,229.76, 777,449.13 and 218,710.66 is: 328,110.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,229.76 : 777,449.13 = 218,710.66 : x
  2. Step 2: Convert to fraction form
    518,229.76/777,449.13 = 218,710.66/x
  3. Step 3: Cross multiply
    518,229.76x = 777,449.13 × 218,710.66
  4. Step 4: Simplify right side
    518,229.76x = 170,036,412,338.73
  5. Step 5: Solve for x
    x = 170,036,412,338.73/518,229.76
  6. Step 6: Final answer
    x = 328,110.09

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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.