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Finding the Fourth Proportional to 547.34, 754.31 and 389.98

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Solution

The fourth proportional to 547.34, 754.31 and 389.98 is: 537.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.34 : 754.31 = 389.98 : x
  2. Step 2: Convert to fraction form
    547.34/754.31 = 389.98/x
  3. Step 3: Cross multiply
    547.34x = 754.31 × 389.98
  4. Step 4: Simplify right side
    547.34x = 294,164.90
  5. Step 5: Solve for x
    x = 294,164.90/547.34
  6. Step 6: Final answer
    x = 537.44

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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.