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Finding the Fourth Proportional to 229.61, 316.69 and 194.74

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Solution

The fourth proportional to 229.61, 316.69 and 194.74 is: 268.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.61 : 316.69 = 194.74 : x
  2. Step 2: Convert to fraction form
    229.61/316.69 = 194.74/x
  3. Step 3: Cross multiply
    229.61x = 316.69 × 194.74
  4. Step 4: Simplify right side
    229.61x = 61,670.93
  5. Step 5: Solve for x
    x = 61,670.93/229.61
  6. Step 6: Final answer
    x = 268.59

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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.