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Finding the Fourth Proportional to 400.75, 551.75 and 348.98

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Solution

The fourth proportional to 400.75, 551.75 and 348.98 is: 480.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.75 : 551.75 = 348.98 : x
  2. Step 2: Convert to fraction form
    400.75/551.75 = 348.98/x
  3. Step 3: Cross multiply
    400.75x = 551.75 × 348.98
  4. Step 4: Simplify right side
    400.75x = 192,545.21
  5. Step 5: Solve for x
    x = 192,545.21/400.75
  6. Step 6: Final answer
    x = 480.47

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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.