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Finding the Fourth Proportional to 404.94, 559.53 and 318.27

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Solution

The fourth proportional to 404.94, 559.53 and 318.27 is: 439.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.94 : 559.53 = 318.27 : x
  2. Step 2: Convert to fraction form
    404.94/559.53 = 318.27/x
  3. Step 3: Cross multiply
    404.94x = 559.53 × 318.27
  4. Step 4: Simplify right side
    404.94x = 178,081.61
  5. Step 5: Solve for x
    x = 178,081.61/404.94
  6. Step 6: Final answer
    x = 439.77

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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.