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Finding the Fourth Proportional to 432.47, 648.74 and 124.35

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Solution

The fourth proportional to 432.47, 648.74 and 124.35 is: 186.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.47 : 648.74 = 124.35 : x
  2. Step 2: Convert to fraction form
    432.47/648.74 = 124.35/x
  3. Step 3: Cross multiply
    432.47x = 648.74 × 124.35
  4. Step 4: Simplify right side
    432.47x = 80,670.20
  5. Step 5: Solve for x
    x = 80,670.20/432.47
  6. Step 6: Final answer
    x = 186.54

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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.