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Finding the Fourth Proportional to 547.74, 756.09 and 351.42

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Solution

The fourth proportional to 547.74, 756.09 and 351.42 is: 485.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.74 : 756.09 = 351.42 : x
  2. Step 2: Convert to fraction form
    547.74/756.09 = 351.42/x
  3. Step 3: Cross multiply
    547.74x = 756.09 × 351.42
  4. Step 4: Simplify right side
    547.74x = 265,705.15
  5. Step 5: Solve for x
    x = 265,705.15/547.74
  6. Step 6: Final answer
    x = 485.09

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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.