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Finding the Fourth Proportional to 613.87, 835.80 and 611.92

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Solution

The fourth proportional to 613.87, 835.80 and 611.92 is: 833.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.87 : 835.80 = 611.92 : x
  2. Step 2: Convert to fraction form
    613.87/835.80 = 611.92/x
  3. Step 3: Cross multiply
    613.87x = 835.80 × 611.92
  4. Step 4: Simplify right side
    613.87x = 511,442.74
  5. Step 5: Solve for x
    x = 511,442.74/613.87
  6. Step 6: Final answer
    x = 833.15

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.