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Finding the Fourth Proportional to 404.90, 551.24 and 401.30

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Solution

The fourth proportional to 404.90, 551.24 and 401.30 is: 546.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.90 : 551.24 = 401.30 : x
  2. Step 2: Convert to fraction form
    404.90/551.24 = 401.30/x
  3. Step 3: Cross multiply
    404.90x = 551.24 × 401.30
  4. Step 4: Simplify right side
    404.90x = 221,212.61
  5. Step 5: Solve for x
    x = 221,212.61/404.90
  6. Step 6: Final answer
    x = 546.34

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.