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Finding the Fourth Proportional to 689.62, 948.89 and 673.22

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Solution

The fourth proportional to 689.62, 948.89 and 673.22 is: 926.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.62 : 948.89 = 673.22 : x
  2. Step 2: Convert to fraction form
    689.62/948.89 = 673.22/x
  3. Step 3: Cross multiply
    689.62x = 948.89 × 673.22
  4. Step 4: Simplify right side
    689.62x = 638,811.73
  5. Step 5: Solve for x
    x = 638,811.73/689.62
  6. Step 6: Final answer
    x = 926.32

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Double scale
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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.