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Finding the Fourth Proportional to 251.98, 347.85 and 158.86

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Solution

The fourth proportional to 251.98, 347.85 and 158.86 is: 219.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.98 : 347.85 = 158.86 : x
  2. Step 2: Convert to fraction form
    251.98/347.85 = 158.86/x
  3. Step 3: Cross multiply
    251.98x = 347.85 × 158.86
  4. Step 4: Simplify right side
    251.98x = 55,258.58
  5. Step 5: Solve for x
    x = 55,258.58/251.98
  6. Step 6: Final answer
    x = 219.30

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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.