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Finding the Fourth Proportional to 509.35, 763.99 and 314.39

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Solution

The fourth proportional to 509.35, 763.99 and 314.39 is: 471.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.35 : 763.99 = 314.39 : x
  2. Step 2: Convert to fraction form
    509.35/763.99 = 314.39/x
  3. Step 3: Cross multiply
    509.35x = 763.99 × 314.39
  4. Step 4: Simplify right side
    509.35x = 240,190.82
  5. Step 5: Solve for x
    x = 240,190.82/509.35
  6. Step 6: Final answer
    x = 471.56

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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.