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Finding the Fourth Proportional to 432.41, 648.35 and 198.22

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Solution

The fourth proportional to 432.41, 648.35 and 198.22 is: 297.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.41 : 648.35 = 198.22 : x
  2. Step 2: Convert to fraction form
    432.41/648.35 = 198.22/x
  3. Step 3: Cross multiply
    432.41x = 648.35 × 198.22
  4. Step 4: Simplify right side
    432.41x = 128,513.33
  5. Step 5: Solve for x
    x = 128,513.33/432.41
  6. Step 6: Final answer
    x = 297.20

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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.