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Finding the Fourth Proportional to 218,999.20, 328,498.80 and 52,787.20

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Solution

The fourth proportional to 218,999.20, 328,498.80 and 52,787.20 is: 79,180.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,999.20 : 328,498.80 = 52,787.20 : x
  2. Step 2: Convert to fraction form
    218,999.20/328,498.80 = 52,787.20/x
  3. Step 3: Cross multiply
    218,999.20x = 328,498.80 × 52,787.20
  4. Step 4: Simplify right side
    218,999.20x = 17,340,531,855.36
  5. Step 5: Solve for x
    x = 17,340,531,855.36/218,999.20
  6. Step 6: Final answer
    x = 79,180.80

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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.