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Finding the Fourth Proportional to 548.42, 756.79 and 299.70

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Solution

The fourth proportional to 548.42, 756.79 and 299.70 is: 413.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.42 : 756.79 = 299.70 : x
  2. Step 2: Convert to fraction form
    548.42/756.79 = 299.70/x
  3. Step 3: Cross multiply
    548.42x = 756.79 × 299.70
  4. Step 4: Simplify right side
    548.42x = 226,809.21
  5. Step 5: Solve for x
    x = 226,809.21/548.42
  6. Step 6: Final answer
    x = 413.57

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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.