Home / 2,915.96-4,371.68-1,989.24

Finding the Fourth Proportional to 2,915.96, 4,371.68 and 1,989.24

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Solution

The fourth proportional to 2,915.96, 4,371.68 and 1,989.24 is: 2,982.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,915.96 : 4,371.68 = 1,989.24 : x
  2. Step 2: Convert to fraction form
    2,915.96/4,371.68 = 1,989.24/x
  3. Step 3: Cross multiply
    2,915.96x = 4,371.68 × 1,989.24
  4. Step 4: Simplify right side
    2,915.96x = 8,696,320.72
  5. Step 5: Solve for x
    x = 8,696,320.72/2,915.96
  6. Step 6: Final answer
    x = 2,982.32

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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.