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Finding the Fourth Proportional to 230.25, 317.78 and 142.93

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Solution

The fourth proportional to 230.25, 317.78 and 142.93 is: 197.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.25 : 317.78 = 142.93 : x
  2. Step 2: Convert to fraction form
    230.25/317.78 = 142.93/x
  3. Step 3: Cross multiply
    230.25x = 317.78 × 142.93
  4. Step 4: Simplify right side
    230.25x = 45,420.30
  5. Step 5: Solve for x
    x = 45,420.30/230.25
  6. Step 6: Final answer
    x = 197.27

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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.