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Finding the Fourth Proportional to 391,538.21, 587,417.57 and 151,724.54

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Solution

The fourth proportional to 391,538.21, 587,417.57 and 151,724.54 is: 227,629.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,538.21 : 587,417.57 = 151,724.54 : x
  2. Step 2: Convert to fraction form
    391,538.21/587,417.57 = 151,724.54/x
  3. Step 3: Cross multiply
    391,538.21x = 587,417.57 × 151,724.54
  4. Step 4: Simplify right side
    391,538.21x = 89,125,661,875.06
  5. Step 5: Solve for x
    x = 89,125,661,875.06/391,538.21
  6. Step 6: Final answer
    x = 227,629.54

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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.