Home / 1,917.12-2,655.64-1,878.24

Finding the Fourth Proportional to 1,917.12, 2,655.64 and 1,878.24

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Solution

The fourth proportional to 1,917.12, 2,655.64 and 1,878.24 is: 2,601.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.12 : 2,655.64 = 1,878.24 : x
  2. Step 2: Convert to fraction form
    1,917.12/2,655.64 = 1,878.24/x
  3. Step 3: Cross multiply
    1,917.12x = 2,655.64 × 1,878.24
  4. Step 4: Simplify right side
    1,917.12x = 4,987,929.27
  5. Step 5: Solve for x
    x = 4,987,929.27/1,917.12
  6. Step 6: Final answer
    x = 2,601.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.