Home / 1,381.08-2,067.30-730.20

Finding the Fourth Proportional to 1,381.08, 2,067.30 and 730.20

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Solution

The fourth proportional to 1,381.08, 2,067.30 and 730.20 is: 1,093.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381.08 : 2,067.30 = 730.20 : x
  2. Step 2: Convert to fraction form
    1,381.08/2,067.30 = 730.20/x
  3. Step 3: Cross multiply
    1,381.08x = 2,067.30 × 730.20
  4. Step 4: Simplify right side
    1,381.08x = 1,509,542.46
  5. Step 5: Solve for x
    x = 1,509,542.46/1,381.08
  6. Step 6: Final answer
    x = 1,093.02

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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.