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Finding the Fourth Proportional to 489.38, 675.31 and 268.35

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Solution

The fourth proportional to 489.38, 675.31 and 268.35 is: 370.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.38 : 675.31 = 268.35 : x
  2. Step 2: Convert to fraction form
    489.38/675.31 = 268.35/x
  3. Step 3: Cross multiply
    489.38x = 675.31 × 268.35
  4. Step 4: Simplify right side
    489.38x = 181,218.10
  5. Step 5: Solve for x
    x = 181,218.10/489.38
  6. Step 6: Final answer
    x = 370.30

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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.