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Finding the Fourth Proportional to 150.47, 207.61 and 115.53

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Solution

The fourth proportional to 150.47, 207.61 and 115.53 is: 159.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.47 : 207.61 = 115.53 : x
  2. Step 2: Convert to fraction form
    150.47/207.61 = 115.53/x
  3. Step 3: Cross multiply
    150.47x = 207.61 × 115.53
  4. Step 4: Simplify right side
    150.47x = 23,985.18
  5. Step 5: Solve for x
    x = 23,985.18/150.47
  6. Step 6: Final answer
    x = 159.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.