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Finding the Fourth Proportional to 694.30, 1,039.02 and 548.50

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Solution

The fourth proportional to 694.30, 1,039.02 and 548.50 is: 820.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.30 : 1,039.02 = 548.50 : x
  2. Step 2: Convert to fraction form
    694.30/1,039.02 = 548.50/x
  3. Step 3: Cross multiply
    694.30x = 1,039.02 × 548.50
  4. Step 4: Simplify right side
    694.30x = 569,902.47
  5. Step 5: Solve for x
    x = 569,902.47/694.30
  6. Step 6: Final answer
    x = 820.83

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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.