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Finding the Fourth Proportional to 1,760.99, 2,640.72 and 939.08

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Solution

The fourth proportional to 1,760.99, 2,640.72 and 939.08 is: 1,408.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,760.99 : 2,640.72 = 939.08 : x
  2. Step 2: Convert to fraction form
    1,760.99/2,640.72 = 939.08/x
  3. Step 3: Cross multiply
    1,760.99x = 2,640.72 × 939.08
  4. Step 4: Simplify right side
    1,760.99x = 2,479,847.34
  5. Step 5: Solve for x
    x = 2,479,847.34/1,760.99
  6. Step 6: Final answer
    x = 1,408.21

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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.