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Finding the Fourth Proportional to 867.61, 1,197.38 and 494.61

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Solution

The fourth proportional to 867.61, 1,197.38 and 494.61 is: 682.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.61 : 1,197.38 = 494.61 : x
  2. Step 2: Convert to fraction form
    867.61/1,197.38 = 494.61/x
  3. Step 3: Cross multiply
    867.61x = 1,197.38 × 494.61
  4. Step 4: Simplify right side
    867.61x = 592,232.87
  5. Step 5: Solve for x
    x = 592,232.87/867.61
  6. Step 6: Final answer
    x = 682.60

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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.