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Finding the Fourth Proportional to 404.61, 559.05 and 394.24

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Solution

The fourth proportional to 404.61, 559.05 and 394.24 is: 544.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.61 : 559.05 = 394.24 : x
  2. Step 2: Convert to fraction form
    404.61/559.05 = 394.24/x
  3. Step 3: Cross multiply
    404.61x = 559.05 × 394.24
  4. Step 4: Simplify right side
    404.61x = 220,399.87
  5. Step 5: Solve for x
    x = 220,399.87/404.61
  6. Step 6: Final answer
    x = 544.72

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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.