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Finding the Fourth Proportional to 478.38, 660.15 and 268.56

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Solution

The fourth proportional to 478.38, 660.15 and 268.56 is: 370.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.38 : 660.15 = 268.56 : x
  2. Step 2: Convert to fraction form
    478.38/660.15 = 268.56/x
  3. Step 3: Cross multiply
    478.38x = 660.15 × 268.56
  4. Step 4: Simplify right side
    478.38x = 177,287.41
  5. Step 5: Solve for x
    x = 177,287.41/478.38
  6. Step 6: Final answer
    x = 370.60

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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.