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Finding the Fourth Proportional to 229.80, 317.15 and 151.18

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Solution

The fourth proportional to 229.80, 317.15 and 151.18 is: 208.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.80 : 317.15 = 151.18 : x
  2. Step 2: Convert to fraction form
    229.80/317.15 = 151.18/x
  3. Step 3: Cross multiply
    229.80x = 317.15 × 151.18
  4. Step 4: Simplify right side
    229.80x = 47,946.74
  5. Step 5: Solve for x
    x = 47,946.74/229.80
  6. Step 6: Final answer
    x = 208.65

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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.