Home / 1,788.10-2,682.24-489.40

Finding the Fourth Proportional to 1,788.10, 2,682.24 and 489.40

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Solution

The fourth proportional to 1,788.10, 2,682.24 and 489.40 is: 734.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,788.10 : 2,682.24 = 489.40 : x
  2. Step 2: Convert to fraction form
    1,788.10/2,682.24 = 489.40/x
  3. Step 3: Cross multiply
    1,788.10x = 2,682.24 × 489.40
  4. Step 4: Simplify right side
    1,788.10x = 1,312,688.26
  5. Step 5: Solve for x
    x = 1,312,688.26/1,788.10
  6. Step 6: Final answer
    x = 734.12

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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.