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Finding the Fourth Proportional to 696.30, 1,039.04 and 634.98

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Solution

The fourth proportional to 696.30, 1,039.04 and 634.98 is: 947.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.30 : 1,039.04 = 634.98 : x
  2. Step 2: Convert to fraction form
    696.30/1,039.04 = 634.98/x
  3. Step 3: Cross multiply
    696.30x = 1,039.04 × 634.98
  4. Step 4: Simplify right side
    696.30x = 659,766.44
  5. Step 5: Solve for x
    x = 659,766.44/696.30
  6. Step 6: Final answer
    x = 947.53

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.