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Finding the Fourth Proportional to 251.40, 346.70 and 158.12

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Solution

The fourth proportional to 251.40, 346.70 and 158.12 is: 218.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.40 : 346.70 = 158.12 : x
  2. Step 2: Convert to fraction form
    251.40/346.70 = 158.12/x
  3. Step 3: Cross multiply
    251.40x = 346.70 × 158.12
  4. Step 4: Simplify right side
    251.40x = 54,817.68
  5. Step 5: Solve for x
    x = 54,817.68/251.40
  6. Step 6: Final answer
    x = 218.05

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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.