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Finding the Fourth Proportional to 653.25, 979.87 and 166.30

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Solution

The fourth proportional to 653.25, 979.87 and 166.30 is: 249.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.25 : 979.87 = 166.30 : x
  2. Step 2: Convert to fraction form
    653.25/979.87 = 166.30/x
  3. Step 3: Cross multiply
    653.25x = 979.87 × 166.30
  4. Step 4: Simplify right side
    653.25x = 162,952.38
  5. Step 5: Solve for x
    x = 162,952.38/653.25
  6. Step 6: Final answer
    x = 249.45

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.