Home / 1,789.20-2,683.14-618.90

Finding the Fourth Proportional to 1,789.20, 2,683.14 and 618.90

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Solution

The fourth proportional to 1,789.20, 2,683.14 and 618.90 is: 928.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,789.20 : 2,683.14 = 618.90 : x
  2. Step 2: Convert to fraction form
    1,789.20/2,683.14 = 618.90/x
  3. Step 3: Cross multiply
    1,789.20x = 2,683.14 × 618.90
  4. Step 4: Simplify right side
    1,789.20x = 1,660,595.35
  5. Step 5: Solve for x
    x = 1,660,595.35/1,789.20
  6. Step 6: Final answer
    x = 928.12

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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.