Home / 1,988.37-2,744.51-1,191.87

Finding the Fourth Proportional to 1,988.37, 2,744.51 and 1,191.87

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Solution

The fourth proportional to 1,988.37, 2,744.51 and 1,191.87 is: 1,645.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.37 : 2,744.51 = 1,191.87 : x
  2. Step 2: Convert to fraction form
    1,988.37/2,744.51 = 1,191.87/x
  3. Step 3: Cross multiply
    1,988.37x = 2,744.51 × 1,191.87
  4. Step 4: Simplify right side
    1,988.37x = 3,271,093.17
  5. Step 5: Solve for x
    x = 3,271,093.17/1,988.37
  6. Step 6: Final answer
    x = 1,645.11

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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.