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Finding the Fourth Proportional to 1,915.41, 2,873.13 and 682.87

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Solution

The fourth proportional to 1,915.41, 2,873.13 and 682.87 is: 1,024.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.41 : 2,873.13 = 682.87 : x
  2. Step 2: Convert to fraction form
    1,915.41/2,873.13 = 682.87/x
  3. Step 3: Cross multiply
    1,915.41x = 2,873.13 × 682.87
  4. Step 4: Simplify right side
    1,915.41x = 1,961,974.28
  5. Step 5: Solve for x
    x = 1,961,974.28/1,915.41
  6. Step 6: Final answer
    x = 1,024.31

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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.