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Finding the Fourth Proportional to 400.68, 552.78 and 270

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Solution

The fourth proportional to 400.68, 552.78 and 270 is: 372.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.68 : 552.78 = 270 : x
  2. Step 2: Convert to fraction form
    400.68/552.78 = 270/x
  3. Step 3: Cross multiply
    400.68x = 552.78 × 270
  4. Step 4: Simplify right side
    400.68x = 149,250.60
  5. Step 5: Solve for x
    x = 149,250.60/400.68
  6. Step 6: Final answer
    x = 372.49

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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.