Home / 1,720.92-2,581.38-1,210.20

Finding the Fourth Proportional to 1,720.92, 2,581.38 and 1,210.20

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Solution

The fourth proportional to 1,720.92, 2,581.38 and 1,210.20 is: 1,815.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.92 : 2,581.38 = 1,210.20 : x
  2. Step 2: Convert to fraction form
    1,720.92/2,581.38 = 1,210.20/x
  3. Step 3: Cross multiply
    1,720.92x = 2,581.38 × 1,210.20
  4. Step 4: Simplify right side
    1,720.92x = 3,123,986.08
  5. Step 5: Solve for x
    x = 3,123,986.08/1,720.92
  6. Step 6: Final answer
    x = 1,815.30

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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.