Home / 2,087.90-2,881.32-1,143.68

Finding the Fourth Proportional to 2,087.90, 2,881.32 and 1,143.68

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Solution

The fourth proportional to 2,087.90, 2,881.32 and 1,143.68 is: 1,578.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,087.90 : 2,881.32 = 1,143.68 : x
  2. Step 2: Convert to fraction form
    2,087.90/2,881.32 = 1,143.68/x
  3. Step 3: Cross multiply
    2,087.90x = 2,881.32 × 1,143.68
  4. Step 4: Simplify right side
    2,087.90x = 3,295,308.06
  5. Step 5: Solve for x
    x = 3,295,308.06/2,087.90
  6. Step 6: Final answer
    x = 1,578.29

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1.5x scale

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.