Home / 1,921.40-2,649.75-1,425.27

Finding the Fourth Proportional to 1,921.40, 2,649.75 and 1,425.27

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Solution

The fourth proportional to 1,921.40, 2,649.75 and 1,425.27 is: 1,965.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.40 : 2,649.75 = 1,425.27 : x
  2. Step 2: Convert to fraction form
    1,921.40/2,649.75 = 1,425.27/x
  3. Step 3: Cross multiply
    1,921.40x = 2,649.75 × 1,425.27
  4. Step 4: Simplify right side
    1,921.40x = 3,776,621.15
  5. Step 5: Solve for x
    x = 3,776,621.15/1,921.40
  6. Step 6: Final answer
    x = 1,965.56

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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.