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Finding the Fourth Proportional to 1,788.38, 2,682.34 and 489.74

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Solution

The fourth proportional to 1,788.38, 2,682.34 and 489.74 is: 734.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,788.38 : 2,682.34 = 489.74 : x
  2. Step 2: Convert to fraction form
    1,788.38/2,682.34 = 489.74/x
  3. Step 3: Cross multiply
    1,788.38x = 2,682.34 × 489.74
  4. Step 4: Simplify right side
    1,788.38x = 1,313,649.19
  5. Step 5: Solve for x
    x = 1,313,649.19/1,788.38
  6. Step 6: Final answer
    x = 734.55

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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.