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Finding the Fourth Proportional to 1,293.93, 1,937.79 and 1,138.28

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Solution

The fourth proportional to 1,293.93, 1,937.79 and 1,138.28 is: 1,704.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.93 : 1,937.79 = 1,138.28 : x
  2. Step 2: Convert to fraction form
    1,293.93/1,937.79 = 1,138.28/x
  3. Step 3: Cross multiply
    1,293.93x = 1,937.79 × 1,138.28
  4. Step 4: Simplify right side
    1,293.93x = 2,205,737.91
  5. Step 5: Solve for x
    x = 2,205,737.91/1,293.93
  6. Step 6: Final answer
    x = 1,704.68

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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.