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Finding the Fourth Proportional to 1,721.85, 2,581.47 and 886.80

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Solution

The fourth proportional to 1,721.85, 2,581.47 and 886.80 is: 1,329.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.85 : 2,581.47 = 886.80 : x
  2. Step 2: Convert to fraction form
    1,721.85/2,581.47 = 886.80/x
  3. Step 3: Cross multiply
    1,721.85x = 2,581.47 × 886.80
  4. Step 4: Simplify right side
    1,721.85x = 2,289,247.60
  5. Step 5: Solve for x
    x = 2,289,247.60/1,721.85
  6. Step 6: Final answer
    x = 1,329.53

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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.