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Finding the Fourth Proportional to 613.07, 845.88 and 392.09

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Solution

The fourth proportional to 613.07, 845.88 and 392.09 is: 540.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.07 : 845.88 = 392.09 : x
  2. Step 2: Convert to fraction form
    613.07/845.88 = 392.09/x
  3. Step 3: Cross multiply
    613.07x = 845.88 × 392.09
  4. Step 4: Simplify right side
    613.07x = 331,660.15
  5. Step 5: Solve for x
    x = 331,660.15/613.07
  6. Step 6: Final answer
    x = 540.98

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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.