Home / 2,087.97-3,135.07-1,312.89

Finding the Fourth Proportional to 2,087.97, 3,135.07 and 1,312.89

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Solution

The fourth proportional to 2,087.97, 3,135.07 and 1,312.89 is: 1,971.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,087.97 : 3,135.07 = 1,312.89 : x
  2. Step 2: Convert to fraction form
    2,087.97/3,135.07 = 1,312.89/x
  3. Step 3: Cross multiply
    2,087.97x = 3,135.07 × 1,312.89
  4. Step 4: Simplify right side
    2,087.97x = 4,115,991.94
  5. Step 5: Solve for x
    x = 4,115,991.94/2,087.97
  6. Step 6: Final answer
    x = 1,971.29

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1.5x scale

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.