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Finding the Fourth Proportional to 653.47, 980 and 191.12

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Solution

The fourth proportional to 653.47, 980 and 191.12 is: 286.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.47 : 980 = 191.12 : x
  2. Step 2: Convert to fraction form
    653.47/980 = 191.12/x
  3. Step 3: Cross multiply
    653.47x = 980 × 191.12
  4. Step 4: Simplify right side
    653.47x = 187,292.70
  5. Step 5: Solve for x
    x = 187,292.70/653.47
  6. Step 6: Final answer
    x = 286.61

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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.