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Finding the Fourth Proportional to 218,916.80, 328,375.20 and 52,704.80

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Solution

The fourth proportional to 218,916.80, 328,375.20 and 52,704.80 is: 79,057.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,916.80 : 328,375.20 = 52,704.80 : x
  2. Step 2: Convert to fraction form
    218,916.80/328,375.20 = 52,704.80/x
  3. Step 3: Cross multiply
    218,916.80x = 328,375.20 × 52,704.80
  4. Step 4: Simplify right side
    218,916.80x = 17,306,949,240.96
  5. Step 5: Solve for x
    x = 17,306,949,240.96/218,916.80
  6. Step 6: Final answer
    x = 79,057.20

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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.