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Finding the Fourth Proportional to 218,964.20, 328,446.30 and 52,752.20

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Solution

The fourth proportional to 218,964.20, 328,446.30 and 52,752.20 is: 79,128.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,964.20 : 328,446.30 = 52,752.20 : x
  2. Step 2: Convert to fraction form
    218,964.20/328,446.30 = 52,752.20/x
  3. Step 3: Cross multiply
    218,964.20x = 328,446.30 × 52,752.20
  4. Step 4: Simplify right side
    218,964.20x = 17,326,264,906.86
  5. Step 5: Solve for x
    x = 17,326,264,906.86/218,964.20
  6. Step 6: Final answer
    x = 79,128.30

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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.