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Finding the Fourth Proportional to 439.30, 661.98 and 363.96

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Solution

The fourth proportional to 439.30, 661.98 and 363.96 is: 548.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.30 : 661.98 = 363.96 : x
  2. Step 2: Convert to fraction form
    439.30/661.98 = 363.96/x
  3. Step 3: Cross multiply
    439.30x = 661.98 × 363.96
  4. Step 4: Simplify right side
    439.30x = 240,934.24
  5. Step 5: Solve for x
    x = 240,934.24/439.30
  6. Step 6: Final answer
    x = 548.45

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.