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Finding the Fourth Proportional to 150.55, 224.74 and 139.28

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Solution

The fourth proportional to 150.55, 224.74 and 139.28 is: 207.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.55 : 224.74 = 139.28 : x
  2. Step 2: Convert to fraction form
    150.55/224.74 = 139.28/x
  3. Step 3: Cross multiply
    150.55x = 224.74 × 139.28
  4. Step 4: Simplify right side
    150.55x = 31,302.10
  5. Step 5: Solve for x
    x = 31,302.10/150.55
  6. Step 6: Final answer
    x = 207.91

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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.