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Finding the Fourth Proportional to 655.33, 980.63 and 394.41

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Solution

The fourth proportional to 655.33, 980.63 and 394.41 is: 590.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.33 : 980.63 = 394.41 : x
  2. Step 2: Convert to fraction form
    655.33/980.63 = 394.41/x
  3. Step 3: Cross multiply
    655.33x = 980.63 × 394.41
  4. Step 4: Simplify right side
    655.33x = 386,770.28
  5. Step 5: Solve for x
    x = 386,770.28/655.33
  6. Step 6: Final answer
    x = 590.19

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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.