Home / 1,905.52-2,855.70-1,211.08

Finding the Fourth Proportional to 1,905.52, 2,855.70 and 1,211.08

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Solution

The fourth proportional to 1,905.52, 2,855.70 and 1,211.08 is: 1,814.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.52 : 2,855.70 = 1,211.08 : x
  2. Step 2: Convert to fraction form
    1,905.52/2,855.70 = 1,211.08/x
  3. Step 3: Cross multiply
    1,905.52x = 2,855.70 × 1,211.08
  4. Step 4: Simplify right side
    1,905.52x = 3,458,481.16
  5. Step 5: Solve for x
    x = 3,458,481.16/1,905.52
  6. Step 6: Final answer
    x = 1,814.98

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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.