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Finding the Fourth Proportional to 391,342.40, 587,087.34 and 148,256.29

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Solution

The fourth proportional to 391,342.40, 587,087.34 and 148,256.29 is: 222,412.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,342.40 : 587,087.34 = 148,256.29 : x
  2. Step 2: Convert to fraction form
    391,342.40/587,087.34 = 148,256.29/x
  3. Step 3: Cross multiply
    391,342.40x = 587,087.34 × 148,256.29
  4. Step 4: Simplify right side
    391,342.40x = 87,039,387,998.93
  5. Step 5: Solve for x
    x = 87,039,387,998.93/391,342.40
  6. Step 6: Final answer
    x = 222,412.36

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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.