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Finding the Fourth Proportional to 230.07, 317.49 and 147.21

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Solution

The fourth proportional to 230.07, 317.49 and 147.21 is: 203.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.07 : 317.49 = 147.21 : x
  2. Step 2: Convert to fraction form
    230.07/317.49 = 147.21/x
  3. Step 3: Cross multiply
    230.07x = 317.49 × 147.21
  4. Step 4: Simplify right side
    230.07x = 46,737.70
  5. Step 5: Solve for x
    x = 46,737.70/230.07
  6. Step 6: Final answer
    x = 203.15

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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.