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Finding the Fourth Proportional to 865.48, 1,193.46 and 616.84

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Solution

The fourth proportional to 865.48, 1,193.46 and 616.84 is: 850.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.48 : 1,193.46 = 616.84 : x
  2. Step 2: Convert to fraction form
    865.48/1,193.46 = 616.84/x
  3. Step 3: Cross multiply
    865.48x = 1,193.46 × 616.84
  4. Step 4: Simplify right side
    865.48x = 736,173.87
  5. Step 5: Solve for x
    x = 736,173.87/865.48
  6. Step 6: Final answer
    x = 850.60

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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.