Home / 2,827.90-4,240.78-1,138.78

Finding the Fourth Proportional to 2,827.90, 4,240.78 and 1,138.78

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Solution

The fourth proportional to 2,827.90, 4,240.78 and 1,138.78 is: 1,707.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,827.90 : 4,240.78 = 1,138.78 : x
  2. Step 2: Convert to fraction form
    2,827.90/4,240.78 = 1,138.78/x
  3. Step 3: Cross multiply
    2,827.90x = 4,240.78 × 1,138.78
  4. Step 4: Simplify right side
    2,827.90x = 4,829,315.45
  5. Step 5: Solve for x
    x = 4,829,315.45/2,827.90
  6. Step 6: Final answer
    x = 1,707.74

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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.