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Finding the Fourth Proportional to 689.28, 950.76 and 440.49

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Solution

The fourth proportional to 689.28, 950.76 and 440.49 is: 607.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.28 : 950.76 = 440.49 : x
  2. Step 2: Convert to fraction form
    689.28/950.76 = 440.49/x
  3. Step 3: Cross multiply
    689.28x = 950.76 × 440.49
  4. Step 4: Simplify right side
    689.28x = 418,800.27
  5. Step 5: Solve for x
    x = 418,800.27/689.28
  6. Step 6: Final answer
    x = 607.59

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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.