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Finding the Fourth Proportional to 655.28, 980.72 and 491.84

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Solution

The fourth proportional to 655.28, 980.72 and 491.84 is: 736.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.28 : 980.72 = 491.84 : x
  2. Step 2: Convert to fraction form
    655.28/980.72 = 491.84/x
  3. Step 3: Cross multiply
    655.28x = 980.72 × 491.84
  4. Step 4: Simplify right side
    655.28x = 482,357.32
  5. Step 5: Solve for x
    x = 482,357.32/655.28
  6. Step 6: Final answer
    x = 736.11

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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.