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Finding the Fourth Proportional to 230.40, 316.32 and 197.58

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Solution

The fourth proportional to 230.40, 316.32 and 197.58 is: 271.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.40 : 316.32 = 197.58 : x
  2. Step 2: Convert to fraction form
    230.40/316.32 = 197.58/x
  3. Step 3: Cross multiply
    230.40x = 316.32 × 197.58
  4. Step 4: Simplify right side
    230.40x = 62,498.51
  5. Step 5: Solve for x
    x = 62,498.51/230.40
  6. Step 6: Final answer
    x = 271.26

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.