Home / 1,517.20-2,273.40-785.68

Finding the Fourth Proportional to 1,517.20, 2,273.40 and 785.68

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Solution

The fourth proportional to 1,517.20, 2,273.40 and 785.68 is: 1,177.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,517.20 : 2,273.40 = 785.68 : x
  2. Step 2: Convert to fraction form
    1,517.20/2,273.40 = 785.68/x
  3. Step 3: Cross multiply
    1,517.20x = 2,273.40 × 785.68
  4. Step 4: Simplify right side
    1,517.20x = 1,786,164.91
  5. Step 5: Solve for x
    x = 1,786,164.91/1,517.20
  6. Step 6: Final answer
    x = 1,177.28

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1.5x scale

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.