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Finding the Fourth Proportional to 400.08, 551.92 and 275.91

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Solution

The fourth proportional to 400.08, 551.92 and 275.91 is: 380.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.08 : 551.92 = 275.91 : x
  2. Step 2: Convert to fraction form
    400.08/551.92 = 275.91/x
  3. Step 3: Cross multiply
    400.08x = 551.92 × 275.91
  4. Step 4: Simplify right side
    400.08x = 152,280.25
  5. Step 5: Solve for x
    x = 152,280.25/400.08
  6. Step 6: Final answer
    x = 380.62

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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.