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Finding the Fourth Proportional to 154.16, 229.60 and 149.90

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Solution

The fourth proportional to 154.16, 229.60 and 149.90 is: 223.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.16 : 229.60 = 149.90 : x
  2. Step 2: Convert to fraction form
    154.16/229.60 = 149.90/x
  3. Step 3: Cross multiply
    154.16x = 229.60 × 149.90
  4. Step 4: Simplify right side
    154.16x = 34,417.04
  5. Step 5: Solve for x
    x = 34,417.04/154.16
  6. Step 6: Final answer
    x = 223.26

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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.