Home / 1,651.14-2,278.44-905.09

Finding the Fourth Proportional to 1,651.14, 2,278.44 and 905.09

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Solution

The fourth proportional to 1,651.14, 2,278.44 and 905.09 is: 1,248.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,651.14 : 2,278.44 = 905.09 : x
  2. Step 2: Convert to fraction form
    1,651.14/2,278.44 = 905.09/x
  3. Step 3: Cross multiply
    1,651.14x = 2,278.44 × 905.09
  4. Step 4: Simplify right side
    1,651.14x = 2,062,181.87
  5. Step 5: Solve for x
    x = 2,062,181.87/1,651.14
  6. Step 6: Final answer
    x = 1,248.94

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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.