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Finding the Fourth Proportional to 150.28, 224.26 and 128.60

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Solution

The fourth proportional to 150.28, 224.26 and 128.60 is: 191.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.28 : 224.26 = 128.60 : x
  2. Step 2: Convert to fraction form
    150.28/224.26 = 128.60/x
  3. Step 3: Cross multiply
    150.28x = 224.26 × 128.60
  4. Step 4: Simplify right side
    150.28x = 28,839.84
  5. Step 5: Solve for x
    x = 28,839.84/150.28
  6. Step 6: Final answer
    x = 191.91

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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.