Home / 1,917.95-2,645.36-1,171.30

Finding the Fourth Proportional to 1,917.95, 2,645.36 and 1,171.30

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Solution

The fourth proportional to 1,917.95, 2,645.36 and 1,171.30 is: 1,615.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.95 : 2,645.36 = 1,171.30 : x
  2. Step 2: Convert to fraction form
    1,917.95/2,645.36 = 1,171.30/x
  3. Step 3: Cross multiply
    1,917.95x = 2,645.36 × 1,171.30
  4. Step 4: Simplify right side
    1,917.95x = 3,098,503.33
  5. Step 5: Solve for x
    x = 3,098,503.33/1,917.95
  6. Step 6: Final answer
    x = 1,615.53

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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.