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Finding the Fourth Proportional to 404.94, 559.17 and 317.46

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Solution

The fourth proportional to 404.94, 559.17 and 317.46 is: 438.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.94 : 559.17 = 317.46 : x
  2. Step 2: Convert to fraction form
    404.94/559.17 = 317.46/x
  3. Step 3: Cross multiply
    404.94x = 559.17 × 317.46
  4. Step 4: Simplify right side
    404.94x = 177,514.11
  5. Step 5: Solve for x
    x = 177,514.11/404.94
  6. Step 6: Final answer
    x = 438.37

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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.