Home / 1,789.40-2,471.37-1,231.58

Finding the Fourth Proportional to 1,789.40, 2,471.37 and 1,231.58

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Solution

The fourth proportional to 1,789.40, 2,471.37 and 1,231.58 is: 1,700.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,789.40 : 2,471.37 = 1,231.58 : x
  2. Step 2: Convert to fraction form
    1,789.40/2,471.37 = 1,231.58/x
  3. Step 3: Cross multiply
    1,789.40x = 2,471.37 × 1,231.58
  4. Step 4: Simplify right side
    1,789.40x = 3,043,689.86
  5. Step 5: Solve for x
    x = 3,043,689.86/1,789.40
  6. Step 6: Final answer
    x = 1,700.96

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1.5x scale

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.