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Finding the Fourth Proportional to 230.31, 317.72 and 147.38

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Solution

The fourth proportional to 230.31, 317.72 and 147.38 is: 203.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.31 : 317.72 = 147.38 : x
  2. Step 2: Convert to fraction form
    230.31/317.72 = 147.38/x
  3. Step 3: Cross multiply
    230.31x = 317.72 × 147.38
  4. Step 4: Simplify right side
    230.31x = 46,825.57
  5. Step 5: Solve for x
    x = 46,825.57/230.31
  6. Step 6: Final answer
    x = 203.32

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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.