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Finding the Fourth Proportional to 338.76, 508.24 and 143.66

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Solution

The fourth proportional to 338.76, 508.24 and 143.66 is: 215.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.76 : 508.24 = 143.66 : x
  2. Step 2: Convert to fraction form
    338.76/508.24 = 143.66/x
  3. Step 3: Cross multiply
    338.76x = 508.24 × 143.66
  4. Step 4: Simplify right side
    338.76x = 73,010.86
  5. Step 5: Solve for x
    x = 73,010.86/338.76
  6. Step 6: Final answer
    x = 215.53

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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.