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Finding the Fourth Proportional to 867.74, 1,197.36 and 494.60

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Solution

The fourth proportional to 867.74, 1,197.36 and 494.60 is: 682.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.74 : 1,197.36 = 494.60 : x
  2. Step 2: Convert to fraction form
    867.74/1,197.36 = 494.60/x
  3. Step 3: Cross multiply
    867.74x = 1,197.36 × 494.60
  4. Step 4: Simplify right side
    867.74x = 592,214.26
  5. Step 5: Solve for x
    x = 592,214.26/867.74
  6. Step 6: Final answer
    x = 682.48

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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.