Home / 1,917.72-2,646.34-1,078.44

Finding the Fourth Proportional to 1,917.72, 2,646.34 and 1,078.44

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Solution

The fourth proportional to 1,917.72, 2,646.34 and 1,078.44 is: 1,488.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.72 : 2,646.34 = 1,078.44 : x
  2. Step 2: Convert to fraction form
    1,917.72/2,646.34 = 1,078.44/x
  3. Step 3: Cross multiply
    1,917.72x = 2,646.34 × 1,078.44
  4. Step 4: Simplify right side
    1,917.72x = 2,853,918.91
  5. Step 5: Solve for x
    x = 2,853,918.91/1,917.72
  6. Step 6: Final answer
    x = 1,488.18

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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.