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Finding the Fourth Proportional to 404.79, 556.80 and 338.37

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Solution

The fourth proportional to 404.79, 556.80 and 338.37 is: 465.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.79 : 556.80 = 338.37 : x
  2. Step 2: Convert to fraction form
    404.79/556.80 = 338.37/x
  3. Step 3: Cross multiply
    404.79x = 556.80 × 338.37
  4. Step 4: Simplify right side
    404.79x = 188,404.42
  5. Step 5: Solve for x
    x = 188,404.42/404.79
  6. Step 6: Final answer
    x = 465.44

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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.