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Finding the Fourth Proportional to 548.99, 757.85 and 391.94

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Solution

The fourth proportional to 548.99, 757.85 and 391.94 is: 541.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.99 : 757.85 = 391.94 : x
  2. Step 2: Convert to fraction form
    548.99/757.85 = 391.94/x
  3. Step 3: Cross multiply
    548.99x = 757.85 × 391.94
  4. Step 4: Simplify right side
    548.99x = 297,025.98
  5. Step 5: Solve for x
    x = 297,025.98/548.99
  6. Step 6: Final answer
    x = 541.05

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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.