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Finding the Fourth Proportional to 939.02, 1,408.80 and 696.02

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Solution

The fourth proportional to 939.02, 1,408.80 and 696.02 is: 1,044.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.02 : 1,408.80 = 696.02 : x
  2. Step 2: Convert to fraction form
    939.02/1,408.80 = 696.02/x
  3. Step 3: Cross multiply
    939.02x = 1,408.80 × 696.02
  4. Step 4: Simplify right side
    939.02x = 980,552.98
  5. Step 5: Solve for x
    x = 980,552.98/939.02
  6. Step 6: Final answer
    x = 1,044.23

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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.