Home / 1,724.20-2,586.30-860.20

Finding the Fourth Proportional to 1,724.20, 2,586.30 and 860.20

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Solution

The fourth proportional to 1,724.20, 2,586.30 and 860.20 is: 1,290.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,724.20 : 2,586.30 = 860.20 : x
  2. Step 2: Convert to fraction form
    1,724.20/2,586.30 = 860.20/x
  3. Step 3: Cross multiply
    1,724.20x = 2,586.30 × 860.20
  4. Step 4: Simplify right side
    1,724.20x = 2,224,735.26
  5. Step 5: Solve for x
    x = 2,224,735.26/1,724.20
  6. Step 6: Final answer
    x = 1,290.30

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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.