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Finding the Fourth Proportional to 653.89, 980.84 and 191.68

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Solution

The fourth proportional to 653.89, 980.84 and 191.68 is: 287.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.89 : 980.84 = 191.68 : x
  2. Step 2: Convert to fraction form
    653.89/980.84 = 191.68/x
  3. Step 3: Cross multiply
    653.89x = 980.84 × 191.68
  4. Step 4: Simplify right side
    653.89x = 188,007.41
  5. Step 5: Solve for x
    x = 188,007.41/653.89
  6. Step 6: Final answer
    x = 287.52

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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.