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Finding the Fourth Proportional to 2,478.38, 3,717.56 and 939.38

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Solution

The fourth proportional to 2,478.38, 3,717.56 and 939.38 is: 1,409.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,478.38 : 3,717.56 = 939.38 : x
  2. Step 2: Convert to fraction form
    2,478.38/3,717.56 = 939.38/x
  3. Step 3: Cross multiply
    2,478.38x = 3,717.56 × 939.38
  4. Step 4: Simplify right side
    2,478.38x = 3,492,185.27
  5. Step 5: Solve for x
    x = 3,492,185.27/2,478.38
  6. Step 6: Final answer
    x = 1,409.06

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.