Home / 1,788.39-2,682.45-489.87

Finding the Fourth Proportional to 1,788.39, 2,682.45 and 489.87

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Solution

The fourth proportional to 1,788.39, 2,682.45 and 489.87 is: 734.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,788.39 : 2,682.45 = 489.87 : x
  2. Step 2: Convert to fraction form
    1,788.39/2,682.45 = 489.87/x
  3. Step 3: Cross multiply
    1,788.39x = 2,682.45 × 489.87
  4. Step 4: Simplify right side
    1,788.39x = 1,314,051.78
  5. Step 5: Solve for x
    x = 1,314,051.78/1,788.39
  6. Step 6: Final answer
    x = 734.77

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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.