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Finding the Fourth Proportional to 149.28, 204.80 and 147.12

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Solution

The fourth proportional to 149.28, 204.80 and 147.12 is: 201.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.28 : 204.80 = 147.12 : x
  2. Step 2: Convert to fraction form
    149.28/204.80 = 147.12/x
  3. Step 3: Cross multiply
    149.28x = 204.80 × 147.12
  4. Step 4: Simplify right side
    149.28x = 30,130.18
  5. Step 5: Solve for x
    x = 30,130.18/149.28
  6. Step 6: Final answer
    x = 201.84

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.