Home / 1,427.94-2,139.14-939.52

Finding the Fourth Proportional to 1,427.94, 2,139.14 and 939.52

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Solution

The fourth proportional to 1,427.94, 2,139.14 and 939.52 is: 1,407.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.94 : 2,139.14 = 939.52 : x
  2. Step 2: Convert to fraction form
    1,427.94/2,139.14 = 939.52/x
  3. Step 3: Cross multiply
    1,427.94x = 2,139.14 × 939.52
  4. Step 4: Simplify right side
    1,427.94x = 2,009,764.81
  5. Step 5: Solve for x
    x = 2,009,764.81/1,427.94
  6. Step 6: Final answer
    x = 1,407.46

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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.