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Finding the Fourth Proportional to 939.50, 1,297.03 and 625.19

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Solution

The fourth proportional to 939.50, 1,297.03 and 625.19 is: 863.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.50 : 1,297.03 = 625.19 : x
  2. Step 2: Convert to fraction form
    939.50/1,297.03 = 625.19/x
  3. Step 3: Cross multiply
    939.50x = 1,297.03 × 625.19
  4. Step 4: Simplify right side
    939.50x = 810,890.19
  5. Step 5: Solve for x
    x = 810,890.19/939.50
  6. Step 6: Final answer
    x = 863.11

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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.