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Finding the Fourth Proportional to 1,913.38, 2,870.07 and 743.92

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Solution

The fourth proportional to 1,913.38, 2,870.07 and 743.92 is: 1,115.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.38 : 2,870.07 = 743.92 : x
  2. Step 2: Convert to fraction form
    1,913.38/2,870.07 = 743.92/x
  3. Step 3: Cross multiply
    1,913.38x = 2,870.07 × 743.92
  4. Step 4: Simplify right side
    1,913.38x = 2,135,102.47
  5. Step 5: Solve for x
    x = 2,135,102.47/1,913.38
  6. Step 6: Final answer
    x = 1,115.88

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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.