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Finding the Fourth Proportional to 554,419.91, 765,053.48 and 312,761.87

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Solution

The fourth proportional to 554,419.91, 765,053.48 and 312,761.87 is: 431,585.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,419.91 : 765,053.48 = 312,761.87 : x
  2. Step 2: Convert to fraction form
    554,419.91/765,053.48 = 312,761.87/x
  3. Step 3: Cross multiply
    554,419.91x = 765,053.48 × 312,761.87
  4. Step 4: Simplify right side
    554,419.91x = 239,279,551,665.73
  5. Step 5: Solve for x
    x = 239,279,551,665.73/554,419.91
  6. Step 6: Final answer
    x = 431,585.43

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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.