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Finding the Fourth Proportional to 1,913.84, 2,874.08 and 1,138.73

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Solution

The fourth proportional to 1,913.84, 2,874.08 and 1,138.73 is: 1,710.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.84 : 2,874.08 = 1,138.73 : x
  2. Step 2: Convert to fraction form
    1,913.84/2,874.08 = 1,138.73/x
  3. Step 3: Cross multiply
    1,913.84x = 2,874.08 × 1,138.73
  4. Step 4: Simplify right side
    1,913.84x = 3,272,781.05
  5. Step 5: Solve for x
    x = 3,272,781.05/1,913.84
  6. Step 6: Final answer
    x = 1,710.06

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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.