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Finding the Fourth Proportional to 230.20, 317.22 and 186.28

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Solution

The fourth proportional to 230.20, 317.22 and 186.28 is: 256.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.20 : 317.22 = 186.28 : x
  2. Step 2: Convert to fraction form
    230.20/317.22 = 186.28/x
  3. Step 3: Cross multiply
    230.20x = 317.22 × 186.28
  4. Step 4: Simplify right side
    230.20x = 59,091.74
  5. Step 5: Solve for x
    x = 59,091.74/230.20
  6. Step 6: Final answer
    x = 256.70

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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.