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Finding the Fourth Proportional to 1,659.57, 2,488.74 and 489.25

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Solution

The fourth proportional to 1,659.57, 2,488.74 and 489.25 is: 733.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,659.57 : 2,488.74 = 489.25 : x
  2. Step 2: Convert to fraction form
    1,659.57/2,488.74 = 489.25/x
  3. Step 3: Cross multiply
    1,659.57x = 2,488.74 × 489.25
  4. Step 4: Simplify right side
    1,659.57x = 1,217,616.05
  5. Step 5: Solve for x
    x = 1,217,616.05/1,659.57
  6. Step 6: Final answer
    x = 733.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.