Home / 2,585.20-3,869.70-1,856.20

Finding the Fourth Proportional to 2,585.20, 3,869.70 and 1,856.20

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Solution

The fourth proportional to 2,585.20, 3,869.70 and 1,856.20 is: 2,778.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,585.20 : 3,869.70 = 1,856.20 : x
  2. Step 2: Convert to fraction form
    2,585.20/3,869.70 = 1,856.20/x
  3. Step 3: Cross multiply
    2,585.20x = 3,869.70 × 1,856.20
  4. Step 4: Simplify right side
    2,585.20x = 7,182,937.14
  5. Step 5: Solve for x
    x = 7,182,937.14/2,585.20
  6. Step 6: Final answer
    x = 2,778.48

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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.