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Finding the Fourth Proportional to 489.15, 675.03 and 268.11

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Solution

The fourth proportional to 489.15, 675.03 and 268.11 is: 369.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.15 : 675.03 = 268.11 : x
  2. Step 2: Convert to fraction form
    489.15/675.03 = 268.11/x
  3. Step 3: Cross multiply
    489.15x = 675.03 × 268.11
  4. Step 4: Simplify right side
    489.15x = 180,982.29
  5. Step 5: Solve for x
    x = 180,982.29/489.15
  6. Step 6: Final answer
    x = 369.99

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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.