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Finding the Fourth Proportional to 486.90, 672.30 and 363.96

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Solution

The fourth proportional to 486.90, 672.30 and 363.96 is: 502.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.90 : 672.30 = 363.96 : x
  2. Step 2: Convert to fraction form
    486.90/672.30 = 363.96/x
  3. Step 3: Cross multiply
    486.90x = 672.30 × 363.96
  4. Step 4: Simplify right side
    486.90x = 244,690.31
  5. Step 5: Solve for x
    x = 244,690.31/486.90
  6. Step 6: Final answer
    x = 502.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.