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Finding the Fourth Proportional to 546.70, 818.70 and 438.70

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Solution

The fourth proportional to 546.70, 818.70 and 438.70 is: 656.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.70 : 818.70 = 438.70 : x
  2. Step 2: Convert to fraction form
    546.70/818.70 = 438.70/x
  3. Step 3: Cross multiply
    546.70x = 818.70 × 438.70
  4. Step 4: Simplify right side
    546.70x = 359,163.69
  5. Step 5: Solve for x
    x = 359,163.69/546.70
  6. Step 6: Final answer
    x = 656.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.