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Finding the Fourth Proportional to 832.86, 1,239.46 and 805.18

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Solution

The fourth proportional to 832.86, 1,239.46 and 805.18 is: 1,198.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    832.86 : 1,239.46 = 805.18 : x
  2. Step 2: Convert to fraction form
    832.86/1,239.46 = 805.18/x
  3. Step 3: Cross multiply
    832.86x = 1,239.46 × 805.18
  4. Step 4: Simplify right side
    832.86x = 997,988.40
  5. Step 5: Solve for x
    x = 997,988.40/832.86
  6. Step 6: Final answer
    x = 1,198.27

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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.