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Finding the Fourth Proportional to 387,425.70, 534,753 and 251,451.72

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Solution

The fourth proportional to 387,425.70, 534,753 and 251,451.72 is: 347,071.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,425.70 : 534,753 = 251,451.72 : x
  2. Step 2: Convert to fraction form
    387,425.70/534,753 = 251,451.72/x
  3. Step 3: Cross multiply
    387,425.70x = 534,753 × 251,451.72
  4. Step 4: Simplify right side
    387,425.70x = 134,464,561,625.16
  5. Step 5: Solve for x
    x = 134,464,561,625.16/387,425.70
  6. Step 6: Final answer
    x = 347,071.87

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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.