Home / 3,078.95-4,240.32-2,881.31

Finding the Fourth Proportional to 3,078.95, 4,240.32 and 2,881.31

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Solution

The fourth proportional to 3,078.95, 4,240.32 and 2,881.31 is: 3,968.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.95 : 4,240.32 = 2,881.31 : x
  2. Step 2: Convert to fraction form
    3,078.95/4,240.32 = 2,881.31/x
  3. Step 3: Cross multiply
    3,078.95x = 4,240.32 × 2,881.31
  4. Step 4: Simplify right side
    3,078.95x = 12,217,676.42
  5. Step 5: Solve for x
    x = 12,217,676.42/3,078.95
  6. Step 6: Final answer
    x = 3,968.13

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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.