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Finding the Fourth Proportional to 251.26, 346.40 and 216.66

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Solution

The fourth proportional to 251.26, 346.40 and 216.66 is: 298.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.26 : 346.40 = 216.66 : x
  2. Step 2: Convert to fraction form
    251.26/346.40 = 216.66/x
  3. Step 3: Cross multiply
    251.26x = 346.40 × 216.66
  4. Step 4: Simplify right side
    251.26x = 75,051.02
  5. Step 5: Solve for x
    x = 75,051.02/251.26
  6. Step 6: Final answer
    x = 298.70

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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.