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Finding the Fourth Proportional to 404.13, 554.06 and 396.84

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Solution

The fourth proportional to 404.13, 554.06 and 396.84 is: 544.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.13 : 554.06 = 396.84 : x
  2. Step 2: Convert to fraction form
    404.13/554.06 = 396.84/x
  3. Step 3: Cross multiply
    404.13x = 554.06 × 396.84
  4. Step 4: Simplify right side
    404.13x = 219,871.19
  5. Step 5: Solve for x
    x = 219,871.19/404.13
  6. Step 6: Final answer
    x = 544.06

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.