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Finding the Fourth Proportional to 404.94, 559.08 and 280.56

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Solution

The fourth proportional to 404.94, 559.08 and 280.56 is: 387.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.94 : 559.08 = 280.56 : x
  2. Step 2: Convert to fraction form
    404.94/559.08 = 280.56/x
  3. Step 3: Cross multiply
    404.94x = 559.08 × 280.56
  4. Step 4: Simplify right side
    404.94x = 156,855.48
  5. Step 5: Solve for x
    x = 156,855.48/404.94
  6. Step 6: Final answer
    x = 387.35

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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.