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Finding the Fourth Proportional to 1,768.26, 2,651.76 and 728.22

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Solution

The fourth proportional to 1,768.26, 2,651.76 and 728.22 is: 1,092.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,768.26 : 2,651.76 = 728.22 : x
  2. Step 2: Convert to fraction form
    1,768.26/2,651.76 = 728.22/x
  3. Step 3: Cross multiply
    1,768.26x = 2,651.76 × 728.22
  4. Step 4: Simplify right side
    1,768.26x = 1,931,064.67
  5. Step 5: Solve for x
    x = 1,931,064.67/1,768.26
  6. Step 6: Final answer
    x = 1,092.07

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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.