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Finding the Fourth Proportional to 843.15, 1,162.85 and 708.03

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Solution

The fourth proportional to 843.15, 1,162.85 and 708.03 is: 976.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.15 : 1,162.85 = 708.03 : x
  2. Step 2: Convert to fraction form
    843.15/1,162.85 = 708.03/x
  3. Step 3: Cross multiply
    843.15x = 1,162.85 × 708.03
  4. Step 4: Simplify right side
    843.15x = 823,332.69
  5. Step 5: Solve for x
    x = 823,332.69/843.15
  6. Step 6: Final answer
    x = 976.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.