Home / 1,921.38-2,651.36-1,175.03

Finding the Fourth Proportional to 1,921.38, 2,651.36 and 1,175.03

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Solution

The fourth proportional to 1,921.38, 2,651.36 and 1,175.03 is: 1,621.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.38 : 2,651.36 = 1,175.03 : x
  2. Step 2: Convert to fraction form
    1,921.38/2,651.36 = 1,175.03/x
  3. Step 3: Cross multiply
    1,921.38x = 2,651.36 × 1,175.03
  4. Step 4: Simplify right side
    1,921.38x = 3,115,427.54
  5. Step 5: Solve for x
    x = 3,115,427.54/1,921.38
  6. Step 6: Final answer
    x = 1,621.45

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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.