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Finding the Fourth Proportional to 404.11, 558.36 and 393.74

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Solution

The fourth proportional to 404.11, 558.36 and 393.74 is: 544.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.11 : 558.36 = 393.74 : x
  2. Step 2: Convert to fraction form
    404.11/558.36 = 393.74/x
  3. Step 3: Cross multiply
    404.11x = 558.36 × 393.74
  4. Step 4: Simplify right side
    404.11x = 219,848.67
  5. Step 5: Solve for x
    x = 219,848.67/404.11
  6. Step 6: Final answer
    x = 544.03

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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.