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Finding the Fourth Proportional to 230.64, 317.70 and 215.52

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Solution

The fourth proportional to 230.64, 317.70 and 215.52 is: 296.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.64 : 317.70 = 215.52 : x
  2. Step 2: Convert to fraction form
    230.64/317.70 = 215.52/x
  3. Step 3: Cross multiply
    230.64x = 317.70 × 215.52
  4. Step 4: Simplify right side
    230.64x = 68,470.70
  5. Step 5: Solve for x
    x = 68,470.70/230.64
  6. Step 6: Final answer
    x = 296.87

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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.