Home / 1,788.19-2,682.28-489.66

Finding the Fourth Proportional to 1,788.19, 2,682.28 and 489.66

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Solution

The fourth proportional to 1,788.19, 2,682.28 and 489.66 is: 734.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,788.19 : 2,682.28 = 489.66 : x
  2. Step 2: Convert to fraction form
    1,788.19/2,682.28 = 489.66/x
  3. Step 3: Cross multiply
    1,788.19x = 2,682.28 × 489.66
  4. Step 4: Simplify right side
    1,788.19x = 1,313,395.78
  5. Step 5: Solve for x
    x = 1,313,395.78/1,788.19
  6. Step 6: Final answer
    x = 734.48

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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.