Home / 1,911.68-2,638.32-1,125.71

Finding the Fourth Proportional to 1,911.68, 2,638.32 and 1,125.71

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Solution

The fourth proportional to 1,911.68, 2,638.32 and 1,125.71 is: 1,553.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.68 : 2,638.32 = 1,125.71 : x
  2. Step 2: Convert to fraction form
    1,911.68/2,638.32 = 1,125.71/x
  3. Step 3: Cross multiply
    1,911.68x = 2,638.32 × 1,125.71
  4. Step 4: Simplify right side
    1,911.68x = 2,969,983.21
  5. Step 5: Solve for x
    x = 2,969,983.21/1,911.68
  6. Step 6: Final answer
    x = 1,553.60

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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.