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Finding the Fourth Proportional to 823.51, 1,229.39 and 794.67

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Solution

The fourth proportional to 823.51, 1,229.39 and 794.67 is: 1,186.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.51 : 1,229.39 = 794.67 : x
  2. Step 2: Convert to fraction form
    823.51/1,229.39 = 794.67/x
  3. Step 3: Cross multiply
    823.51x = 1,229.39 × 794.67
  4. Step 4: Simplify right side
    823.51x = 976,951.22
  5. Step 5: Solve for x
    x = 976,951.22/823.51
  6. Step 6: Final answer
    x = 1,186.33

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1.5x scale

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.