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Finding the Fourth Proportional to 655.29, 982.26 and 380.91

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Solution

The fourth proportional to 655.29, 982.26 and 380.91 is: 570.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.29 : 982.26 = 380.91 : x
  2. Step 2: Convert to fraction form
    655.29/982.26 = 380.91/x
  3. Step 3: Cross multiply
    655.29x = 982.26 × 380.91
  4. Step 4: Simplify right side
    655.29x = 374,152.66
  5. Step 5: Solve for x
    x = 374,152.66/655.29
  6. Step 6: Final answer
    x = 570.97

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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.