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Finding the Fourth Proportional to 153.72, 228.49 and 149.68

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Solution

The fourth proportional to 153.72, 228.49 and 149.68 is: 222.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.72 : 228.49 = 149.68 : x
  2. Step 2: Convert to fraction form
    153.72/228.49 = 149.68/x
  3. Step 3: Cross multiply
    153.72x = 228.49 × 149.68
  4. Step 4: Simplify right side
    153.72x = 34,200.38
  5. Step 5: Solve for x
    x = 34,200.38/153.72
  6. Step 6: Final answer
    x = 222.48

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.