Home / 2,781.15-3,838.50-1,787.67

Finding the Fourth Proportional to 2,781.15, 3,838.50 and 1,787.67

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Solution

The fourth proportional to 2,781.15, 3,838.50 and 1,787.67 is: 2,467.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.15 : 3,838.50 = 1,787.67 : x
  2. Step 2: Convert to fraction form
    2,781.15/3,838.50 = 1,787.67/x
  3. Step 3: Cross multiply
    2,781.15x = 3,838.50 × 1,787.67
  4. Step 4: Simplify right side
    2,781.15x = 6,861,971.30
  5. Step 5: Solve for x
    x = 6,861,971.30/2,781.15
  6. Step 6: Final answer
    x = 2,467.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.