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Finding the Fourth Proportional to 266,331.20, 398,978.40 and 160,836.80

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Solution

The fourth proportional to 266,331.20, 398,978.40 and 160,836.80 is: 240,942.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,331.20 : 398,978.40 = 160,836.80 : x
  2. Step 2: Convert to fraction form
    266,331.20/398,978.40 = 160,836.80/x
  3. Step 3: Cross multiply
    266,331.20x = 398,978.40 × 160,836.80
  4. Step 4: Simplify right side
    266,331.20x = 64,170,409,125.12
  5. Step 5: Solve for x
    x = 64,170,409,125.12/266,331.20
  6. Step 6: Final answer
    x = 240,942.14

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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.