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Finding the Fourth Proportional to 519.57, 778.75 and 502.56

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Solution

The fourth proportional to 519.57, 778.75 and 502.56 is: 753.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.57 : 778.75 = 502.56 : x
  2. Step 2: Convert to fraction form
    519.57/778.75 = 502.56/x
  3. Step 3: Cross multiply
    519.57x = 778.75 × 502.56
  4. Step 4: Simplify right side
    519.57x = 391,367.34
  5. Step 5: Solve for x
    x = 391,367.34/519.57
  6. Step 6: Final answer
    x = 753.25

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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.