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Finding the Fourth Proportional to 509.20, 763.38 and 200.92

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Solution

The fourth proportional to 509.20, 763.38 and 200.92 is: 301.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.20 : 763.38 = 200.92 : x
  2. Step 2: Convert to fraction form
    509.20/763.38 = 200.92/x
  3. Step 3: Cross multiply
    509.20x = 763.38 × 200.92
  4. Step 4: Simplify right side
    509.20x = 153,378.31
  5. Step 5: Solve for x
    x = 153,378.31/509.20
  6. Step 6: Final answer
    x = 301.21

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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.