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Finding the Fourth Proportional to 849, 1,280.07 and 680.04

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Solution

The fourth proportional to 849, 1,280.07 and 680.04 is: 1,025.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    849 : 1,280.07 = 680.04 : x
  2. Step 2: Convert to fraction form
    849/1,280.07 = 680.04/x
  3. Step 3: Cross multiply
    849x = 1,280.07 × 680.04
  4. Step 4: Simplify right side
    849x = 870,498.80
  5. Step 5: Solve for x
    x = 870,498.80/849
  6. Step 6: Final answer
    x = 1,025.32

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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.