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Finding the Fourth Proportional to 404.10, 557.46 and 338.58

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Solution

The fourth proportional to 404.10, 557.46 and 338.58 is: 467.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.10 : 557.46 = 338.58 : x
  2. Step 2: Convert to fraction form
    404.10/557.46 = 338.58/x
  3. Step 3: Cross multiply
    404.10x = 557.46 × 338.58
  4. Step 4: Simplify right side
    404.10x = 188,744.81
  5. Step 5: Solve for x
    x = 188,744.81/404.10
  6. Step 6: Final answer
    x = 467.07

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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.