Home / 2,686.12-4,028.68-1,125.70

Finding the Fourth Proportional to 2,686.12, 4,028.68 and 1,125.70

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Solution

The fourth proportional to 2,686.12, 4,028.68 and 1,125.70 is: 1,688.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.12 : 4,028.68 = 1,125.70 : x
  2. Step 2: Convert to fraction form
    2,686.12/4,028.68 = 1,125.70/x
  3. Step 3: Cross multiply
    2,686.12x = 4,028.68 × 1,125.70
  4. Step 4: Simplify right side
    2,686.12x = 4,535,085.08
  5. Step 5: Solve for x
    x = 4,535,085.08/2,686.12
  6. Step 6: Final answer
    x = 1,688.34

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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.