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Finding the Fourth Proportional to 839.66, 1,261.55 and 793.04

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Solution

The fourth proportional to 839.66, 1,261.55 and 793.04 is: 1,191.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.66 : 1,261.55 = 793.04 : x
  2. Step 2: Convert to fraction form
    839.66/1,261.55 = 793.04/x
  3. Step 3: Cross multiply
    839.66x = 1,261.55 × 793.04
  4. Step 4: Simplify right side
    839.66x = 1,000,455.29
  5. Step 5: Solve for x
    x = 1,000,455.29/839.66
  6. Step 6: Final answer
    x = 1,191.51

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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.