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Finding the Fourth Proportional to 508.82, 763.25 and 212.31

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Solution

The fourth proportional to 508.82, 763.25 and 212.31 is: 318.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.82 : 763.25 = 212.31 : x
  2. Step 2: Convert to fraction form
    508.82/763.25 = 212.31/x
  3. Step 3: Cross multiply
    508.82x = 763.25 × 212.31
  4. Step 4: Simplify right side
    508.82x = 162,044.55
  5. Step 5: Solve for x
    x = 162,044.55/508.82
  6. Step 6: Final answer
    x = 318.47

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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.