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Finding the Fourth Proportional to 439.68, 660 and 372.04

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Solution

The fourth proportional to 439.68, 660 and 372.04 is: 558.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.68 : 660 = 372.04 : x
  2. Step 2: Convert to fraction form
    439.68/660 = 372.04/x
  3. Step 3: Cross multiply
    439.68x = 660 × 372.04
  4. Step 4: Simplify right side
    439.68x = 245,546.40
  5. Step 5: Solve for x
    x = 245,546.40/439.68
  6. Step 6: Final answer
    x = 558.47

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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.