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Finding the Fourth Proportional to 508.48, 761.96 and 219.76

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Solution

The fourth proportional to 508.48, 761.96 and 219.76 is: 329.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.48 : 761.96 = 219.76 : x
  2. Step 2: Convert to fraction form
    508.48/761.96 = 219.76/x
  3. Step 3: Cross multiply
    508.48x = 761.96 × 219.76
  4. Step 4: Simplify right side
    508.48x = 167,448.33
  5. Step 5: Solve for x
    x = 167,448.33/508.48
  6. Step 6: Final answer
    x = 329.31

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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.