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Finding the Fourth Proportional to 727.75, 1,097.10 and 680.77

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Solution

The fourth proportional to 727.75, 1,097.10 and 680.77 is: 1,026.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.75 : 1,097.10 = 680.77 : x
  2. Step 2: Convert to fraction form
    727.75/1,097.10 = 680.77/x
  3. Step 3: Cross multiply
    727.75x = 1,097.10 × 680.77
  4. Step 4: Simplify right side
    727.75x = 746,867.28
  5. Step 5: Solve for x
    x = 746,867.28/727.75
  6. Step 6: Final answer
    x = 1,026.28

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.