Home / 1,917.66-2,646.27-1,131.78

Finding the Fourth Proportional to 1,917.66, 2,646.27 and 1,131.78

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Solution

The fourth proportional to 1,917.66, 2,646.27 and 1,131.78 is: 1,561.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.66 : 2,646.27 = 1,131.78 : x
  2. Step 2: Convert to fraction form
    1,917.66/2,646.27 = 1,131.78/x
  3. Step 3: Cross multiply
    1,917.66x = 2,646.27 × 1,131.78
  4. Step 4: Simplify right side
    1,917.66x = 2,994,995.46
  5. Step 5: Solve for x
    x = 2,994,995.46/1,917.66
  6. Step 6: Final answer
    x = 1,561.80

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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.