Home / 2,115.41-2,917.89-1,275.50

Finding the Fourth Proportional to 2,115.41, 2,917.89 and 1,275.50

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Solution

The fourth proportional to 2,115.41, 2,917.89 and 1,275.50 is: 1,759.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.41 : 2,917.89 = 1,275.50 : x
  2. Step 2: Convert to fraction form
    2,115.41/2,917.89 = 1,275.50/x
  3. Step 3: Cross multiply
    2,115.41x = 2,917.89 × 1,275.50
  4. Step 4: Simplify right side
    2,115.41x = 3,721,775.99
  5. Step 5: Solve for x
    x = 3,721,775.99/2,115.41
  6. Step 6: Final answer
    x = 1,759.37

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1.5x scale

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.