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Finding the Fourth Proportional to 404.78, 605.96 and 346.64

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Solution

The fourth proportional to 404.78, 605.96 and 346.64 is: 518.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.78 : 605.96 = 346.64 : x
  2. Step 2: Convert to fraction form
    404.78/605.96 = 346.64/x
  3. Step 3: Cross multiply
    404.78x = 605.96 × 346.64
  4. Step 4: Simplify right side
    404.78x = 210,049.97
  5. Step 5: Solve for x
    x = 210,049.97/404.78
  6. Step 6: Final answer
    x = 518.92

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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.