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Finding the Fourth Proportional to 823.08, 1,236.46 and 702.80

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Solution

The fourth proportional to 823.08, 1,236.46 and 702.80 is: 1,055.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.08 : 1,236.46 = 702.80 : x
  2. Step 2: Convert to fraction form
    823.08/1,236.46 = 702.80/x
  3. Step 3: Cross multiply
    823.08x = 1,236.46 × 702.80
  4. Step 4: Simplify right side
    823.08x = 868,984.09
  5. Step 5: Solve for x
    x = 868,984.09/823.08
  6. Step 6: Final answer
    x = 1,055.77

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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.