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Finding the Fourth Proportional to 404.20, 605.34 and 358.60

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Solution

The fourth proportional to 404.20, 605.34 and 358.60 is: 537.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.20 : 605.34 = 358.60 : x
  2. Step 2: Convert to fraction form
    404.20/605.34 = 358.60/x
  3. Step 3: Cross multiply
    404.20x = 605.34 × 358.60
  4. Step 4: Simplify right side
    404.20x = 217,074.92
  5. Step 5: Solve for x
    x = 217,074.92/404.20
  6. Step 6: Final answer
    x = 537.05

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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.