Home / 1,917-2,645.46-1,131.05

Finding the Fourth Proportional to 1,917, 2,645.46 and 1,131.05

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Solution

The fourth proportional to 1,917, 2,645.46 and 1,131.05 is: 1,560.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917 : 2,645.46 = 1,131.05 : x
  2. Step 2: Convert to fraction form
    1,917/2,645.46 = 1,131.05/x
  3. Step 3: Cross multiply
    1,917x = 2,645.46 × 1,131.05
  4. Step 4: Simplify right side
    1,917x = 2,992,139.27
  5. Step 5: Solve for x
    x = 2,992,139.27/1,917
  6. Step 6: Final answer
    x = 1,560.84

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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.