Home / 1,850.45-2,554.05-1,221.09

Finding the Fourth Proportional to 1,850.45, 2,554.05 and 1,221.09

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Solution

The fourth proportional to 1,850.45, 2,554.05 and 1,221.09 is: 1,685.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,850.45 : 2,554.05 = 1,221.09 : x
  2. Step 2: Convert to fraction form
    1,850.45/2,554.05 = 1,221.09/x
  3. Step 3: Cross multiply
    1,850.45x = 2,554.05 × 1,221.09
  4. Step 4: Simplify right side
    1,850.45x = 3,118,724.91
  5. Step 5: Solve for x
    x = 3,118,724.91/1,850.45
  6. Step 6: Final answer
    x = 1,685.39

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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.