Home / 2,201.20-3,036.90-1,257.10

Finding the Fourth Proportional to 2,201.20, 3,036.90 and 1,257.10

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Solution

The fourth proportional to 2,201.20, 3,036.90 and 1,257.10 is: 1,734.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,201.20 : 3,036.90 = 1,257.10 : x
  2. Step 2: Convert to fraction form
    2,201.20/3,036.90 = 1,257.10/x
  3. Step 3: Cross multiply
    2,201.20x = 3,036.90 × 1,257.10
  4. Step 4: Simplify right side
    2,201.20x = 3,817,686.99
  5. Step 5: Solve for x
    x = 3,817,686.99/2,201.20
  6. Step 6: Final answer
    x = 1,734.37

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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.