Home / 1,805.32-2,491.38-1,245.91

Finding the Fourth Proportional to 1,805.32, 2,491.38 and 1,245.91

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Solution

The fourth proportional to 1,805.32, 2,491.38 and 1,245.91 is: 1,719.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.32 : 2,491.38 = 1,245.91 : x
  2. Step 2: Convert to fraction form
    1,805.32/2,491.38 = 1,245.91/x
  3. Step 3: Cross multiply
    1,805.32x = 2,491.38 × 1,245.91
  4. Step 4: Simplify right side
    1,805.32x = 3,104,035.26
  5. Step 5: Solve for x
    x = 3,104,035.26/1,805.32
  6. Step 6: Final answer
    x = 1,719.38

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Half scale
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Double scale
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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.