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Finding the Fourth Proportional to 331.65, 457.50 and 269.55

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Solution

The fourth proportional to 331.65, 457.50 and 269.55 is: 371.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.65 : 457.50 = 269.55 : x
  2. Step 2: Convert to fraction form
    331.65/457.50 = 269.55/x
  3. Step 3: Cross multiply
    331.65x = 457.50 × 269.55
  4. Step 4: Simplify right side
    331.65x = 123,319.13
  5. Step 5: Solve for x
    x = 123,319.13/331.65
  6. Step 6: Final answer
    x = 371.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.