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Finding the Fourth Proportional to 1,294.28, 1,939.74 and 523.88

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Solution

The fourth proportional to 1,294.28, 1,939.74 and 523.88 is: 785.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294.28 : 1,939.74 = 523.88 : x
  2. Step 2: Convert to fraction form
    1,294.28/1,939.74 = 523.88/x
  3. Step 3: Cross multiply
    1,294.28x = 1,939.74 × 523.88
  4. Step 4: Simplify right side
    1,294.28x = 1,016,190.99
  5. Step 5: Solve for x
    x = 1,016,190.99/1,294.28
  6. Step 6: Final answer
    x = 785.14

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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.