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Finding the Fourth Proportional to 689.79, 952.21 and 441.44

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Solution

The fourth proportional to 689.79, 952.21 and 441.44 is: 609.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.79 : 952.21 = 441.44 : x
  2. Step 2: Convert to fraction form
    689.79/952.21 = 441.44/x
  3. Step 3: Cross multiply
    689.79x = 952.21 × 441.44
  4. Step 4: Simplify right side
    689.79x = 420,343.58
  5. Step 5: Solve for x
    x = 420,343.58/689.79
  6. Step 6: Final answer
    x = 609.38

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.