Home / 1,558.20-2,149.38-1,226.12

Finding the Fourth Proportional to 1,558.20, 2,149.38 and 1,226.12

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Solution

The fourth proportional to 1,558.20, 2,149.38 and 1,226.12 is: 1,691.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,558.20 : 2,149.38 = 1,226.12 : x
  2. Step 2: Convert to fraction form
    1,558.20/2,149.38 = 1,226.12/x
  3. Step 3: Cross multiply
    1,558.20x = 2,149.38 × 1,226.12
  4. Step 4: Simplify right side
    1,558.20x = 2,635,397.81
  5. Step 5: Solve for x
    x = 2,635,397.81/1,558.20
  6. Step 6: Final answer
    x = 1,691.31

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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.