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Finding the Fourth Proportional to 391,342.65, 587,087.72 and 148,256.54

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Solution

The fourth proportional to 391,342.65, 587,087.72 and 148,256.54 is: 222,412.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,342.65 : 587,087.72 = 148,256.54 : x
  2. Step 2: Convert to fraction form
    391,342.65/587,087.72 = 148,256.54/x
  3. Step 3: Cross multiply
    391,342.65x = 587,087.72 × 148,256.54
  4. Step 4: Simplify right side
    391,342.65x = 87,039,590,366.97
  5. Step 5: Solve for x
    x = 87,039,590,366.97/391,342.65
  6. Step 6: Final answer
    x = 222,412.74

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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.