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Finding the Fourth Proportional to 400.53, 551.91 and 260.49

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Solution

The fourth proportional to 400.53, 551.91 and 260.49 is: 358.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.53 : 551.91 = 260.49 : x
  2. Step 2: Convert to fraction form
    400.53/551.91 = 260.49/x
  3. Step 3: Cross multiply
    400.53x = 551.91 × 260.49
  4. Step 4: Simplify right side
    400.53x = 143,767.04
  5. Step 5: Solve for x
    x = 143,767.04/400.53
  6. Step 6: Final answer
    x = 358.94

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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.