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Finding the Fourth Proportional to 689.46, 951.12 and 427.56

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Solution

The fourth proportional to 689.46, 951.12 and 427.56 is: 589.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.46 : 951.12 = 427.56 : x
  2. Step 2: Convert to fraction form
    689.46/951.12 = 427.56/x
  3. Step 3: Cross multiply
    689.46x = 951.12 × 427.56
  4. Step 4: Simplify right side
    689.46x = 406,660.87
  5. Step 5: Solve for x
    x = 406,660.87/689.46
  6. Step 6: Final answer
    x = 589.83

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1.5x scale

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.