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Finding the Fourth Proportional to 548.34, 756.77 and 305.83

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Solution

The fourth proportional to 548.34, 756.77 and 305.83 is: 422.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.34 : 756.77 = 305.83 : x
  2. Step 2: Convert to fraction form
    548.34/756.77 = 305.83/x
  3. Step 3: Cross multiply
    548.34x = 756.77 × 305.83
  4. Step 4: Simplify right side
    548.34x = 231,442.84
  5. Step 5: Solve for x
    x = 231,442.84/548.34
  6. Step 6: Final answer
    x = 422.08

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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.