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Finding the Fourth Proportional to 1,392.62, 2,079.39 and 1,342.22

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Solution

The fourth proportional to 1,392.62, 2,079.39 and 1,342.22 is: 2,004.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392.62 : 2,079.39 = 1,342.22 : x
  2. Step 2: Convert to fraction form
    1,392.62/2,079.39 = 1,342.22/x
  3. Step 3: Cross multiply
    1,392.62x = 2,079.39 × 1,342.22
  4. Step 4: Simplify right side
    1,392.62x = 2,790,992.13
  5. Step 5: Solve for x
    x = 2,790,992.13/1,392.62
  6. Step 6: Final answer
    x = 2,004.13

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1.5x scale

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.