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Finding the Fourth Proportional to 400.44, 551.99 and 315.85

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Solution

The fourth proportional to 400.44, 551.99 and 315.85 is: 435.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.44 : 551.99 = 315.85 : x
  2. Step 2: Convert to fraction form
    400.44/551.99 = 315.85/x
  3. Step 3: Cross multiply
    400.44x = 551.99 × 315.85
  4. Step 4: Simplify right side
    400.44x = 174,345.60
  5. Step 5: Solve for x
    x = 174,345.60/400.44
  6. Step 6: Final answer
    x = 435.38

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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.