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Finding the Fourth Proportional to 149.39, 224.36 and 142.64

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Solution

The fourth proportional to 149.39, 224.36 and 142.64 is: 214.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.39 : 224.36 = 142.64 : x
  2. Step 2: Convert to fraction form
    149.39/224.36 = 142.64/x
  3. Step 3: Cross multiply
    149.39x = 224.36 × 142.64
  4. Step 4: Simplify right side
    149.39x = 32,002.71
  5. Step 5: Solve for x
    x = 32,002.71/149.39
  6. Step 6: Final answer
    x = 214.22

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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.