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Finding the Fourth Proportional to 391,624.80, 587,631.60 and 154,975.20

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Solution

The fourth proportional to 391,624.80, 587,631.60 and 154,975.20 is: 232,539.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,624.80 : 587,631.60 = 154,975.20 : x
  2. Step 2: Convert to fraction form
    391,624.80/587,631.60 = 154,975.20/x
  3. Step 3: Cross multiply
    391,624.80x = 587,631.60 × 154,975.20
  4. Step 4: Simplify right side
    391,624.80x = 91,068,324,736.32
  5. Step 5: Solve for x
    x = 91,068,324,736.32/391,624.80
  6. Step 6: Final answer
    x = 232,539.73

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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.