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Finding the Fourth Proportional to 153.47, 230.42 and 130.79

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Solution

The fourth proportional to 153.47, 230.42 and 130.79 is: 196.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.47 : 230.42 = 130.79 : x
  2. Step 2: Convert to fraction form
    153.47/230.42 = 130.79/x
  3. Step 3: Cross multiply
    153.47x = 230.42 × 130.79
  4. Step 4: Simplify right side
    153.47x = 30,136.63
  5. Step 5: Solve for x
    x = 30,136.63/153.47
  6. Step 6: Final answer
    x = 196.37

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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.