Home / 1,778.49-2,455.38-1,115.91

Finding the Fourth Proportional to 1,778.49, 2,455.38 and 1,115.91

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Solution

The fourth proportional to 1,778.49, 2,455.38 and 1,115.91 is: 1,540.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.49 : 2,455.38 = 1,115.91 : x
  2. Step 2: Convert to fraction form
    1,778.49/2,455.38 = 1,115.91/x
  3. Step 3: Cross multiply
    1,778.49x = 2,455.38 × 1,115.91
  4. Step 4: Simplify right side
    1,778.49x = 2,739,983.10
  5. Step 5: Solve for x
    x = 2,739,983.10/1,778.49
  6. Step 6: Final answer
    x = 1,540.62

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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.