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Finding the Fourth Proportional to 548.02, 756.09 and 311.94

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Solution

The fourth proportional to 548.02, 756.09 and 311.94 is: 430.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.02 : 756.09 = 311.94 : x
  2. Step 2: Convert to fraction form
    548.02/756.09 = 311.94/x
  3. Step 3: Cross multiply
    548.02x = 756.09 × 311.94
  4. Step 4: Simplify right side
    548.02x = 235,854.71
  5. Step 5: Solve for x
    x = 235,854.71/548.02
  6. Step 6: Final answer
    x = 430.38

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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.