Home / 1,339.19-2,005.86-1,105.45

Finding the Fourth Proportional to 1,339.19, 2,005.86 and 1,105.45

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Solution

The fourth proportional to 1,339.19, 2,005.86 and 1,105.45 is: 1,655.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339.19 : 2,005.86 = 1,105.45 : x
  2. Step 2: Convert to fraction form
    1,339.19/2,005.86 = 1,105.45/x
  3. Step 3: Cross multiply
    1,339.19x = 2,005.86 × 1,105.45
  4. Step 4: Simplify right side
    1,339.19x = 2,217,377.94
  5. Step 5: Solve for x
    x = 2,217,377.94/1,339.19
  6. Step 6: Final answer
    x = 1,655.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.