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Finding the Fourth Proportional to 548.49, 756.18 and 400.98

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Solution

The fourth proportional to 548.49, 756.18 and 400.98 is: 552.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.49 : 756.18 = 400.98 : x
  2. Step 2: Convert to fraction form
    548.49/756.18 = 400.98/x
  3. Step 3: Cross multiply
    548.49x = 756.18 × 400.98
  4. Step 4: Simplify right side
    548.49x = 303,213.06
  5. Step 5: Solve for x
    x = 303,213.06/548.49
  6. Step 6: Final answer
    x = 552.81

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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.