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Finding the Fourth Proportional to 218,727.60, 328,285.80 and 187,234.80

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Solution

The fourth proportional to 218,727.60, 328,285.80 and 187,234.80 is: 281,018.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,727.60 : 328,285.80 = 187,234.80 : x
  2. Step 2: Convert to fraction form
    218,727.60/328,285.80 = 187,234.80/x
  3. Step 3: Cross multiply
    218,727.60x = 328,285.80 × 187,234.80
  4. Step 4: Simplify right side
    218,727.60x = 61,466,526,105.84
  5. Step 5: Solve for x
    x = 61,466,526,105.84/218,727.60
  6. Step 6: Final answer
    x = 281,018.61

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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.