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Finding the Fourth Proportional to 218,720.60, 327,424.80 and 129,928.40

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Solution

The fourth proportional to 218,720.60, 327,424.80 and 129,928.40 is: 194,502.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,720.60 : 327,424.80 = 129,928.40 : x
  2. Step 2: Convert to fraction form
    218,720.60/327,424.80 = 129,928.40/x
  3. Step 3: Cross multiply
    218,720.60x = 327,424.80 × 129,928.40
  4. Step 4: Simplify right side
    218,720.60x = 42,541,780,384.32
  5. Step 5: Solve for x
    x = 42,541,780,384.32/218,720.60
  6. Step 6: Final answer
    x = 194,502.85

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1.5x scale

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.