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Finding the Fourth Proportional to 432.66, 648.99 and 144.12

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Solution

The fourth proportional to 432.66, 648.99 and 144.12 is: 216.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.66 : 648.99 = 144.12 : x
  2. Step 2: Convert to fraction form
    432.66/648.99 = 144.12/x
  3. Step 3: Cross multiply
    432.66x = 648.99 × 144.12
  4. Step 4: Simplify right side
    432.66x = 93,532.44
  5. Step 5: Solve for x
    x = 93,532.44/432.66
  6. Step 6: Final answer
    x = 216.18

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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.