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Finding the Fourth Proportional to 489.21, 675.12 and 268.17

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Solution

The fourth proportional to 489.21, 675.12 and 268.17 is: 370.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.21 : 675.12 = 268.17 : x
  2. Step 2: Convert to fraction form
    489.21/675.12 = 268.17/x
  3. Step 3: Cross multiply
    489.21x = 675.12 × 268.17
  4. Step 4: Simplify right side
    489.21x = 181,046.93
  5. Step 5: Solve for x
    x = 181,046.93/489.21
  6. Step 6: Final answer
    x = 370.08

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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.