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Finding the Fourth Proportional to 613.92, 845.37 and 515.52

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Solution

The fourth proportional to 613.92, 845.37 and 515.52 is: 709.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.92 : 845.37 = 515.52 : x
  2. Step 2: Convert to fraction form
    613.92/845.37 = 515.52/x
  3. Step 3: Cross multiply
    613.92x = 845.37 × 515.52
  4. Step 4: Simplify right side
    613.92x = 435,805.14
  5. Step 5: Solve for x
    x = 435,805.14/613.92
  6. Step 6: Final answer
    x = 709.87

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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.