Home / 1,720.90-2,581.35-1,641.70

Finding the Fourth Proportional to 1,720.90, 2,581.35 and 1,641.70

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Solution

The fourth proportional to 1,720.90, 2,581.35 and 1,641.70 is: 2,462.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.90 : 2,581.35 = 1,641.70 : x
  2. Step 2: Convert to fraction form
    1,720.90/2,581.35 = 1,641.70/x
  3. Step 3: Cross multiply
    1,720.90x = 2,581.35 × 1,641.70
  4. Step 4: Simplify right side
    1,720.90x = 4,237,802.30
  5. Step 5: Solve for x
    x = 4,237,802.30/1,720.90
  6. Step 6: Final answer
    x = 2,462.55

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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.