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Finding the Fourth Proportional to 229.50, 315.57 and 189.66

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Solution

The fourth proportional to 229.50, 315.57 and 189.66 is: 260.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.50 : 315.57 = 189.66 : x
  2. Step 2: Convert to fraction form
    229.50/315.57 = 189.66/x
  3. Step 3: Cross multiply
    229.50x = 315.57 × 189.66
  4. Step 4: Simplify right side
    229.50x = 59,851.01
  5. Step 5: Solve for x
    x = 59,851.01/229.50
  6. Step 6: Final answer
    x = 260.79

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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.