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Finding the Fourth Proportional to 2,471.11, 3,707.75 and 931.75

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Solution

The fourth proportional to 2,471.11, 3,707.75 and 931.75 is: 1,398.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,471.11 : 3,707.75 = 931.75 : x
  2. Step 2: Convert to fraction form
    2,471.11/3,707.75 = 931.75/x
  3. Step 3: Cross multiply
    2,471.11x = 3,707.75 × 931.75
  4. Step 4: Simplify right side
    2,471.11x = 3,454,696.06
  5. Step 5: Solve for x
    x = 3,454,696.06/2,471.11
  6. Step 6: Final answer
    x = 1,398.03

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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.