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Finding the Fourth Proportional to 867.31, 1,196.83 and 513.25

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Solution

The fourth proportional to 867.31, 1,196.83 and 513.25 is: 708.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.31 : 1,196.83 = 513.25 : x
  2. Step 2: Convert to fraction form
    867.31/1,196.83 = 513.25/x
  3. Step 3: Cross multiply
    867.31x = 1,196.83 × 513.25
  4. Step 4: Simplify right side
    867.31x = 614,273.00
  5. Step 5: Solve for x
    x = 614,273.00/867.31
  6. Step 6: Final answer
    x = 708.25

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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.