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Finding the Fourth Proportional to 653.40, 980.08 and 166.44

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Solution

The fourth proportional to 653.40, 980.08 and 166.44 is: 249.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.40 : 980.08 = 166.44 : x
  2. Step 2: Convert to fraction form
    653.40/980.08 = 166.44/x
  3. Step 3: Cross multiply
    653.40x = 980.08 × 166.44
  4. Step 4: Simplify right side
    653.40x = 163,124.52
  5. Step 5: Solve for x
    x = 163,124.52/653.40
  6. Step 6: Final answer
    x = 249.65

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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.