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Finding the Fourth Proportional to 251.95, 347.90 and 158.80

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Solution

The fourth proportional to 251.95, 347.90 and 158.80 is: 219.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.95 : 347.90 = 158.80 : x
  2. Step 2: Convert to fraction form
    251.95/347.90 = 158.80/x
  3. Step 3: Cross multiply
    251.95x = 347.90 × 158.80
  4. Step 4: Simplify right side
    251.95x = 55,246.52
  5. Step 5: Solve for x
    x = 55,246.52/251.95
  6. Step 6: Final answer
    x = 219.28

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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.