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Finding the Fourth Proportional to 689.34, 951.07 and 423.76

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Solution

The fourth proportional to 689.34, 951.07 and 423.76 is: 584.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.34 : 951.07 = 423.76 : x
  2. Step 2: Convert to fraction form
    689.34/951.07 = 423.76/x
  3. Step 3: Cross multiply
    689.34x = 951.07 × 423.76
  4. Step 4: Simplify right side
    689.34x = 403,025.42
  5. Step 5: Solve for x
    x = 403,025.42/689.34
  6. Step 6: Final answer
    x = 584.65

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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.