Home / 1,067.04-1,591.38-921.78

Finding the Fourth Proportional to 1,067.04, 1,591.38 and 921.78

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Solution

The fourth proportional to 1,067.04, 1,591.38 and 921.78 is: 1,374.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,067.04 : 1,591.38 = 921.78 : x
  2. Step 2: Convert to fraction form
    1,067.04/1,591.38 = 921.78/x
  3. Step 3: Cross multiply
    1,067.04x = 1,591.38 × 921.78
  4. Step 4: Simplify right side
    1,067.04x = 1,466,902.26
  5. Step 5: Solve for x
    x = 1,466,902.26/1,067.04
  6. Step 6: Final answer
    x = 1,374.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.