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Finding the Fourth Proportional to 230.40, 317.88 and 141.92

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Solution

The fourth proportional to 230.40, 317.88 and 141.92 is: 195.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.40 : 317.88 = 141.92 : x
  2. Step 2: Convert to fraction form
    230.40/317.88 = 141.92/x
  3. Step 3: Cross multiply
    230.40x = 317.88 × 141.92
  4. Step 4: Simplify right side
    230.40x = 45,113.53
  5. Step 5: Solve for x
    x = 45,113.53/230.40
  6. Step 6: Final answer
    x = 195.81

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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.