Home / 1,722.35-2,581.25-1,260.80

Finding the Fourth Proportional to 1,722.35, 2,581.25 and 1,260.80

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Solution

The fourth proportional to 1,722.35, 2,581.25 and 1,260.80 is: 1,889.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,722.35 : 2,581.25 = 1,260.80 : x
  2. Step 2: Convert to fraction form
    1,722.35/2,581.25 = 1,260.80/x
  3. Step 3: Cross multiply
    1,722.35x = 2,581.25 × 1,260.80
  4. Step 4: Simplify right side
    1,722.35x = 3,254,440
  5. Step 5: Solve for x
    x = 3,254,440/1,722.35
  6. Step 6: Final answer
    x = 1,889.53

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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.