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Finding the Fourth Proportional to 400.09, 551.71 and 260.21

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Solution

The fourth proportional to 400.09, 551.71 and 260.21 is: 358.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.09 : 551.71 = 260.21 : x
  2. Step 2: Convert to fraction form
    400.09/551.71 = 260.21/x
  3. Step 3: Cross multiply
    400.09x = 551.71 × 260.21
  4. Step 4: Simplify right side
    400.09x = 143,562.16
  5. Step 5: Solve for x
    x = 143,562.16/400.09
  6. Step 6: Final answer
    x = 358.83

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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.