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Finding the Fourth Proportional to 230.09, 317.28 and 147.20

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Solution

The fourth proportional to 230.09, 317.28 and 147.20 is: 202.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.09 : 317.28 = 147.20 : x
  2. Step 2: Convert to fraction form
    230.09/317.28 = 147.20/x
  3. Step 3: Cross multiply
    230.09x = 317.28 × 147.20
  4. Step 4: Simplify right side
    230.09x = 46,703.62
  5. Step 5: Solve for x
    x = 46,703.62/230.09
  6. Step 6: Final answer
    x = 202.98

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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.