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Finding the Fourth Proportional to 655.72, 983.36 and 265.61

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Solution

The fourth proportional to 655.72, 983.36 and 265.61 is: 398.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.72 : 983.36 = 265.61 : x
  2. Step 2: Convert to fraction form
    655.72/983.36 = 265.61/x
  3. Step 3: Cross multiply
    655.72x = 983.36 × 265.61
  4. Step 4: Simplify right side
    655.72x = 261,193.37
  5. Step 5: Solve for x
    x = 261,193.37/655.72
  6. Step 6: Final answer
    x = 398.33

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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.