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Finding the Fourth Proportional to 251.88, 346.86 and 215.16

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Solution

The fourth proportional to 251.88, 346.86 and 215.16 is: 296.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.88 : 346.86 = 215.16 : x
  2. Step 2: Convert to fraction form
    251.88/346.86 = 215.16/x
  3. Step 3: Cross multiply
    251.88x = 346.86 × 215.16
  4. Step 4: Simplify right side
    251.88x = 74,630.40
  5. Step 5: Solve for x
    x = 74,630.40/251.88
  6. Step 6: Final answer
    x = 296.29

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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.