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Finding the Fourth Proportional to 849.92, 1,268.80 and 793.20

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Solution

The fourth proportional to 849.92, 1,268.80 and 793.20 is: 1,184.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.92 : 1,268.80 = 793.20 : x
  2. Step 2: Convert to fraction form
    849.92/1,268.80 = 793.20/x
  3. Step 3: Cross multiply
    849.92x = 1,268.80 × 793.20
  4. Step 4: Simplify right side
    849.92x = 1,006,412.16
  5. Step 5: Solve for x
    x = 1,006,412.16/849.92
  6. Step 6: Final answer
    x = 1,184.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.