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Finding the Fourth Proportional to 3,130.48, 4,694.52 and 939.28

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Solution

The fourth proportional to 3,130.48, 4,694.52 and 939.28 is: 1,408.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.48 : 4,694.52 = 939.28 : x
  2. Step 2: Convert to fraction form
    3,130.48/4,694.52 = 939.28/x
  3. Step 3: Cross multiply
    3,130.48x = 4,694.52 × 939.28
  4. Step 4: Simplify right side
    3,130.48x = 4,409,468.75
  5. Step 5: Solve for x
    x = 4,409,468.75/3,130.48
  6. Step 6: Final answer
    x = 1,408.56

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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.