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Finding the Fourth Proportional to 489.08, 674.99 and 292.55

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Solution

The fourth proportional to 489.08, 674.99 and 292.55 is: 403.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.08 : 674.99 = 292.55 : x
  2. Step 2: Convert to fraction form
    489.08/674.99 = 292.55/x
  3. Step 3: Cross multiply
    489.08x = 674.99 × 292.55
  4. Step 4: Simplify right side
    489.08x = 197,463.49
  5. Step 5: Solve for x
    x = 197,463.49/489.08
  6. Step 6: Final answer
    x = 403.75

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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.