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Finding the Fourth Proportional to 650.85, 976.55 and 520.71

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Solution

The fourth proportional to 650.85, 976.55 and 520.71 is: 781.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.85 : 976.55 = 520.71 : x
  2. Step 2: Convert to fraction form
    650.85/976.55 = 520.71/x
  3. Step 3: Cross multiply
    650.85x = 976.55 × 520.71
  4. Step 4: Simplify right side
    650.85x = 508,496.75
  5. Step 5: Solve for x
    x = 508,496.75/650.85
  6. Step 6: Final answer
    x = 781.28

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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.