Home / 1,917.01-2,645.90-1,218.25

Finding the Fourth Proportional to 1,917.01, 2,645.90 and 1,218.25

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Solution

The fourth proportional to 1,917.01, 2,645.90 and 1,218.25 is: 1,681.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.01 : 2,645.90 = 1,218.25 : x
  2. Step 2: Convert to fraction form
    1,917.01/2,645.90 = 1,218.25/x
  3. Step 3: Cross multiply
    1,917.01x = 2,645.90 × 1,218.25
  4. Step 4: Simplify right side
    1,917.01x = 3,223,367.68
  5. Step 5: Solve for x
    x = 3,223,367.68/1,917.01
  6. Step 6: Final answer
    x = 1,681.46

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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.