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Finding the Fourth Proportional to 546.81, 754.38 and 389.40

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Solution

The fourth proportional to 546.81, 754.38 and 389.40 is: 537.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.81 : 754.38 = 389.40 : x
  2. Step 2: Convert to fraction form
    546.81/754.38 = 389.40/x
  3. Step 3: Cross multiply
    546.81x = 754.38 × 389.40
  4. Step 4: Simplify right side
    546.81x = 293,755.57
  5. Step 5: Solve for x
    x = 293,755.57/546.81
  6. Step 6: Final answer
    x = 537.22

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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.