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Finding the Fourth Proportional to 689.28, 950.10 and 531.36

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Solution

The fourth proportional to 689.28, 950.10 and 531.36 is: 732.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.28 : 950.10 = 531.36 : x
  2. Step 2: Convert to fraction form
    689.28/950.10 = 531.36/x
  3. Step 3: Cross multiply
    689.28x = 950.10 × 531.36
  4. Step 4: Simplify right side
    689.28x = 504,845.14
  5. Step 5: Solve for x
    x = 504,845.14/689.28
  6. Step 6: Final answer
    x = 732.42

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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.