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Finding the Fourth Proportional to 613.67, 920.18 and 305.46

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Solution

The fourth proportional to 613.67, 920.18 and 305.46 is: 458.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.67 : 920.18 = 305.46 : x
  2. Step 2: Convert to fraction form
    613.67/920.18 = 305.46/x
  3. Step 3: Cross multiply
    613.67x = 920.18 × 305.46
  4. Step 4: Simplify right side
    613.67x = 281,076.66
  5. Step 5: Solve for x
    x = 281,076.66/613.67
  6. Step 6: Final answer
    x = 458.03

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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.