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Finding the Fourth Proportional to 1,939.74, 2,908.18 and 1,247.19

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Solution

The fourth proportional to 1,939.74, 2,908.18 and 1,247.19 is: 1,869.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.74 : 2,908.18 = 1,247.19 : x
  2. Step 2: Convert to fraction form
    1,939.74/2,908.18 = 1,247.19/x
  3. Step 3: Cross multiply
    1,939.74x = 2,908.18 × 1,247.19
  4. Step 4: Simplify right side
    1,939.74x = 3,627,053.01
  5. Step 5: Solve for x
    x = 3,627,053.01/1,939.74
  6. Step 6: Final answer
    x = 1,869.87

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1.5x scale

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.