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Finding the Fourth Proportional to 546.85, 753.61 and 389.49

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Solution

The fourth proportional to 546.85, 753.61 and 389.49 is: 536.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.85 : 753.61 = 389.49 : x
  2. Step 2: Convert to fraction form
    546.85/753.61 = 389.49/x
  3. Step 3: Cross multiply
    546.85x = 753.61 × 389.49
  4. Step 4: Simplify right side
    546.85x = 293,523.56
  5. Step 5: Solve for x
    x = 293,523.56/546.85
  6. Step 6: Final answer
    x = 536.75

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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.