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Finding the Fourth Proportional to 650.85, 976.54 and 391.38

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Solution

The fourth proportional to 650.85, 976.54 and 391.38 is: 587.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.85 : 976.54 = 391.38 : x
  2. Step 2: Convert to fraction form
    650.85/976.54 = 391.38/x
  3. Step 3: Cross multiply
    650.85x = 976.54 × 391.38
  4. Step 4: Simplify right side
    650.85x = 382,198.23
  5. Step 5: Solve for x
    x = 382,198.23/650.85
  6. Step 6: Final answer
    x = 587.23

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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.