Home / 1,917.28-2,646.08-1,131.20

Finding the Fourth Proportional to 1,917.28, 2,646.08 and 1,131.20

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Solution

The fourth proportional to 1,917.28, 2,646.08 and 1,131.20 is: 1,561.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.28 : 2,646.08 = 1,131.20 : x
  2. Step 2: Convert to fraction form
    1,917.28/2,646.08 = 1,131.20/x
  3. Step 3: Cross multiply
    1,917.28x = 2,646.08 × 1,131.20
  4. Step 4: Simplify right side
    1,917.28x = 2,993,245.70
  5. Step 5: Solve for x
    x = 2,993,245.70/1,917.28
  6. Step 6: Final answer
    x = 1,561.19

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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.