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Finding the Fourth Proportional to 653.62, 980.60 and 191.42

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Solution

The fourth proportional to 653.62, 980.60 and 191.42 is: 287.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.62 : 980.60 = 191.42 : x
  2. Step 2: Convert to fraction form
    653.62/980.60 = 191.42/x
  3. Step 3: Cross multiply
    653.62x = 980.60 × 191.42
  4. Step 4: Simplify right side
    653.62x = 187,706.45
  5. Step 5: Solve for x
    x = 187,706.45/653.62
  6. Step 6: Final answer
    x = 287.18

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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.