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Finding the Fourth Proportional to 546.74, 754.48 and 310.69

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Solution

The fourth proportional to 546.74, 754.48 and 310.69 is: 428.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.74 : 754.48 = 310.69 : x
  2. Step 2: Convert to fraction form
    546.74/754.48 = 310.69/x
  3. Step 3: Cross multiply
    546.74x = 754.48 × 310.69
  4. Step 4: Simplify right side
    546.74x = 234,409.39
  5. Step 5: Solve for x
    x = 234,409.39/546.74
  6. Step 6: Final answer
    x = 428.74

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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.