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Finding the Fourth Proportional to 218,732.80, 328,099.20 and 217,350.40

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Solution

The fourth proportional to 218,732.80, 328,099.20 and 217,350.40 is: 326,025.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,732.80 : 328,099.20 = 217,350.40 : x
  2. Step 2: Convert to fraction form
    218,732.80/328,099.20 = 217,350.40/x
  3. Step 3: Cross multiply
    218,732.80x = 328,099.20 × 217,350.40
  4. Step 4: Simplify right side
    218,732.80x = 71,312,492,359.68
  5. Step 5: Solve for x
    x = 71,312,492,359.68/218,732.80
  6. Step 6: Final answer
    x = 326,025.60

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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.