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Finding the Fourth Proportional to 613.92, 920.41 and 370.39

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Solution

The fourth proportional to 613.92, 920.41 and 370.39 is: 555.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.92 : 920.41 = 370.39 : x
  2. Step 2: Convert to fraction form
    613.92/920.41 = 370.39/x
  3. Step 3: Cross multiply
    613.92x = 920.41 × 370.39
  4. Step 4: Simplify right side
    613.92x = 340,910.66
  5. Step 5: Solve for x
    x = 340,910.66/613.92
  6. Step 6: Final answer
    x = 555.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.