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Finding the Fourth Proportional to 489.35, 675.31 and 268.31

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Solution

The fourth proportional to 489.35, 675.31 and 268.31 is: 370.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.35 : 675.31 = 268.31 : x
  2. Step 2: Convert to fraction form
    489.35/675.31 = 268.31/x
  3. Step 3: Cross multiply
    489.35x = 675.31 × 268.31
  4. Step 4: Simplify right side
    489.35x = 181,194.70
  5. Step 5: Solve for x
    x = 181,194.70/489.35
  6. Step 6: Final answer
    x = 370.28

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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.