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Finding the Fourth Proportional to 153.80, 230.62 and 147.50

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Solution

The fourth proportional to 153.80, 230.62 and 147.50 is: 221.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.80 : 230.62 = 147.50 : x
  2. Step 2: Convert to fraction form
    153.80/230.62 = 147.50/x
  3. Step 3: Cross multiply
    153.80x = 230.62 × 147.50
  4. Step 4: Simplify right side
    153.80x = 34,016.45
  5. Step 5: Solve for x
    x = 34,016.45/153.80
  6. Step 6: Final answer
    x = 221.17

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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.