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Finding the Fourth Proportional to 331.77, 498.38 and 280.52

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Solution

The fourth proportional to 331.77, 498.38 and 280.52 is: 421.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.77 : 498.38 = 280.52 : x
  2. Step 2: Convert to fraction form
    331.77/498.38 = 280.52/x
  3. Step 3: Cross multiply
    331.77x = 498.38 × 280.52
  4. Step 4: Simplify right side
    331.77x = 139,801.66
  5. Step 5: Solve for x
    x = 139,801.66/331.77
  6. Step 6: Final answer
    x = 421.38

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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.