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Finding the Fourth Proportional to 432.22, 648.40 and 154.50

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Solution

The fourth proportional to 432.22, 648.40 and 154.50 is: 231.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.22 : 648.40 = 154.50 : x
  2. Step 2: Convert to fraction form
    432.22/648.40 = 154.50/x
  3. Step 3: Cross multiply
    432.22x = 648.40 × 154.50
  4. Step 4: Simplify right side
    432.22x = 100,176.66
  5. Step 5: Solve for x
    x = 100,176.66/432.22
  6. Step 6: Final answer
    x = 231.77

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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.