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Finding the Fourth Proportional to 489.15, 675.09 and 292.86

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Solution

The fourth proportional to 489.15, 675.09 and 292.86 is: 404.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.15 : 675.09 = 292.86 : x
  2. Step 2: Convert to fraction form
    489.15/675.09 = 292.86/x
  3. Step 3: Cross multiply
    489.15x = 675.09 × 292.86
  4. Step 4: Simplify right side
    489.15x = 197,706.86
  5. Step 5: Solve for x
    x = 197,706.86/489.15
  6. Step 6: Final answer
    x = 404.18

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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.