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Finding the Fourth Proportional to 218,764.80, 328,147.20 and 185,959.80

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Solution

The fourth proportional to 218,764.80, 328,147.20 and 185,959.80 is: 278,939.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,764.80 : 328,147.20 = 185,959.80 : x
  2. Step 2: Convert to fraction form
    218,764.80/328,147.20 = 185,959.80/x
  3. Step 3: Cross multiply
    218,764.80x = 328,147.20 × 185,959.80
  4. Step 4: Simplify right side
    218,764.80x = 61,022,187,682.56
  5. Step 5: Solve for x
    x = 61,022,187,682.56/218,764.80
  6. Step 6: Final answer
    x = 278,939.70

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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.