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Finding the Fourth Proportional to 356,514, 534,772.21 and 90,274.39

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Solution

The fourth proportional to 356,514, 534,772.21 and 90,274.39 is: 135,411.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,514 : 534,772.21 = 90,274.39 : x
  2. Step 2: Convert to fraction form
    356,514/534,772.21 = 90,274.39/x
  3. Step 3: Cross multiply
    356,514x = 534,772.21 × 90,274.39
  4. Step 4: Simplify right side
    356,514x = 48,276,235,046.70
  5. Step 5: Solve for x
    x = 48,276,235,046.70/356,514
  6. Step 6: Final answer
    x = 135,411.89

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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.