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Finding the Fourth Proportional to 251.39, 347.07 and 162.90

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Solution

The fourth proportional to 251.39, 347.07 and 162.90 is: 224.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.39 : 347.07 = 162.90 : x
  2. Step 2: Convert to fraction form
    251.39/347.07 = 162.90/x
  3. Step 3: Cross multiply
    251.39x = 347.07 × 162.90
  4. Step 4: Simplify right side
    251.39x = 56,537.70
  5. Step 5: Solve for x
    x = 56,537.70/251.39
  6. Step 6: Final answer
    x = 224.90

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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.