Home / 1,917.60-2,645.48-1,131.32

Finding the Fourth Proportional to 1,917.60, 2,645.48 and 1,131.32

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Solution

The fourth proportional to 1,917.60, 2,645.48 and 1,131.32 is: 1,560.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.60 : 2,645.48 = 1,131.32 : x
  2. Step 2: Convert to fraction form
    1,917.60/2,645.48 = 1,131.32/x
  3. Step 3: Cross multiply
    1,917.60x = 2,645.48 × 1,131.32
  4. Step 4: Simplify right side
    1,917.60x = 2,992,884.43
  5. Step 5: Solve for x
    x = 2,992,884.43/1,917.60
  6. Step 6: Final answer
    x = 1,560.74

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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.