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Finding the Fourth Proportional to 399,761.73, 551,504.90 and 261,901.35

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Solution

The fourth proportional to 399,761.73, 551,504.90 and 261,901.35 is: 361,314.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,761.73 : 551,504.90 = 261,901.35 : x
  2. Step 2: Convert to fraction form
    399,761.73/551,504.90 = 261,901.35/x
  3. Step 3: Cross multiply
    399,761.73x = 551,504.90 × 261,901.35
  4. Step 4: Simplify right side
    399,761.73x = 144,439,878,496.37
  5. Step 5: Solve for x
    x = 144,439,878,496.37/399,761.73
  6. Step 6: Final answer
    x = 361,314.92

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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.