Home / 1,911.68-2,638.24-1,165.49

Finding the Fourth Proportional to 1,911.68, 2,638.24 and 1,165.49

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Solution

The fourth proportional to 1,911.68, 2,638.24 and 1,165.49 is: 1,608.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.68 : 2,638.24 = 1,165.49 : x
  2. Step 2: Convert to fraction form
    1,911.68/2,638.24 = 1,165.49/x
  3. Step 3: Cross multiply
    1,911.68x = 2,638.24 × 1,165.49
  4. Step 4: Simplify right side
    1,911.68x = 3,074,842.34
  5. Step 5: Solve for x
    x = 3,074,842.34/1,911.68
  6. Step 6: Final answer
    x = 1,608.45

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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.