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Finding the Fourth Proportional to 548.15, 756.45 and 299.47

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Solution

The fourth proportional to 548.15, 756.45 and 299.47 is: 413.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.15 : 756.45 = 299.47 : x
  2. Step 2: Convert to fraction form
    548.15/756.45 = 299.47/x
  3. Step 3: Cross multiply
    548.15x = 756.45 × 299.47
  4. Step 4: Simplify right side
    548.15x = 226,534.08
  5. Step 5: Solve for x
    x = 226,534.08/548.15
  6. Step 6: Final answer
    x = 413.27

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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.