Home / 1,390.27-1,908.52-1,193.44

Finding the Fourth Proportional to 1,390.27, 1,908.52 and 1,193.44

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Solution

The fourth proportional to 1,390.27, 1,908.52 and 1,193.44 is: 1,638.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.27 : 1,908.52 = 1,193.44 : x
  2. Step 2: Convert to fraction form
    1,390.27/1,908.52 = 1,193.44/x
  3. Step 3: Cross multiply
    1,390.27x = 1,908.52 × 1,193.44
  4. Step 4: Simplify right side
    1,390.27x = 2,277,704.11
  5. Step 5: Solve for x
    x = 2,277,704.11/1,390.27
  6. Step 6: Final answer
    x = 1,638.32

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.