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Finding the Fourth Proportional to 867.46, 1,196.88 and 513.49

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Solution

The fourth proportional to 867.46, 1,196.88 and 513.49 is: 708.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.46 : 1,196.88 = 513.49 : x
  2. Step 2: Convert to fraction form
    867.46/1,196.88 = 513.49/x
  3. Step 3: Cross multiply
    867.46x = 1,196.88 × 513.49
  4. Step 4: Simplify right side
    867.46x = 614,585.91
  5. Step 5: Solve for x
    x = 614,585.91/867.46
  6. Step 6: Final answer
    x = 708.49

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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.