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Finding the Fourth Proportional to 432.52, 648.36 and 143.75

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Solution

The fourth proportional to 432.52, 648.36 and 143.75 is: 215.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.52 : 648.36 = 143.75 : x
  2. Step 2: Convert to fraction form
    432.52/648.36 = 143.75/x
  3. Step 3: Cross multiply
    432.52x = 648.36 × 143.75
  4. Step 4: Simplify right side
    432.52x = 93,201.75
  5. Step 5: Solve for x
    x = 93,201.75/432.52
  6. Step 6: Final answer
    x = 215.49

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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.