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Finding the Fourth Proportional to 689.95, 1,034.65 and 227.71

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Solution

The fourth proportional to 689.95, 1,034.65 and 227.71 is: 341.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.95 : 1,034.65 = 227.71 : x
  2. Step 2: Convert to fraction form
    689.95/1,034.65 = 227.71/x
  3. Step 3: Cross multiply
    689.95x = 1,034.65 × 227.71
  4. Step 4: Simplify right side
    689.95x = 235,600.15
  5. Step 5: Solve for x
    x = 235,600.15/689.95
  6. Step 6: Final answer
    x = 341.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.