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Finding the Fourth Proportional to 3,137.76, 4,703.68 and 1,189.92

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Solution

The fourth proportional to 3,137.76, 4,703.68 and 1,189.92 is: 1,783.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,137.76 : 4,703.68 = 1,189.92 : x
  2. Step 2: Convert to fraction form
    3,137.76/4,703.68 = 1,189.92/x
  3. Step 3: Cross multiply
    3,137.76x = 4,703.68 × 1,189.92
  4. Step 4: Simplify right side
    3,137.76x = 5,597,002.91
  5. Step 5: Solve for x
    x = 5,597,002.91/3,137.76
  6. Step 6: Final answer
    x = 1,783.76

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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.