Home / 1,789.85-2,470.18-1,003.90

Finding the Fourth Proportional to 1,789.85, 2,470.18 and 1,003.90

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Solution

The fourth proportional to 1,789.85, 2,470.18 and 1,003.90 is: 1,385.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,789.85 : 2,470.18 = 1,003.90 : x
  2. Step 2: Convert to fraction form
    1,789.85/2,470.18 = 1,003.90/x
  3. Step 3: Cross multiply
    1,789.85x = 2,470.18 × 1,003.90
  4. Step 4: Simplify right side
    1,789.85x = 2,479,813.70
  5. Step 5: Solve for x
    x = 2,479,813.70/1,789.85
  6. Step 6: Final answer
    x = 1,385.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.