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Finding the Fourth Proportional to 553,379.22, 763,691.70 and 338,451.78

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Solution

The fourth proportional to 553,379.22, 763,691.70 and 338,451.78 is: 467,080.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,379.22 : 763,691.70 = 338,451.78 : x
  2. Step 2: Convert to fraction form
    553,379.22/763,691.70 = 338,451.78/x
  3. Step 3: Cross multiply
    553,379.22x = 763,691.70 × 338,451.78
  4. Step 4: Simplify right side
    553,379.22x = 258,472,815,236.23
  5. Step 5: Solve for x
    x = 258,472,815,236.23/553,379.22
  6. Step 6: Final answer
    x = 467,080.81

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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.