Home / 1,911.16-2,637.09-1,201.78

Finding the Fourth Proportional to 1,911.16, 2,637.09 and 1,201.78

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Solution

The fourth proportional to 1,911.16, 2,637.09 and 1,201.78 is: 1,658.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.16 : 2,637.09 = 1,201.78 : x
  2. Step 2: Convert to fraction form
    1,911.16/2,637.09 = 1,201.78/x
  3. Step 3: Cross multiply
    1,911.16x = 2,637.09 × 1,201.78
  4. Step 4: Simplify right side
    1,911.16x = 3,169,195.22
  5. Step 5: Solve for x
    x = 3,169,195.22/1,911.16
  6. Step 6: Final answer
    x = 1,658.25

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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.