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Finding the Fourth Proportional to 3,807.76, 5,697.79 and 3,143.45

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Solution

The fourth proportional to 3,807.76, 5,697.79 and 3,143.45 is: 4,703.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,807.76 : 5,697.79 = 3,143.45 : x
  2. Step 2: Convert to fraction form
    3,807.76/5,697.79 = 3,143.45/x
  3. Step 3: Cross multiply
    3,807.76x = 5,697.79 × 3,143.45
  4. Step 4: Simplify right side
    3,807.76x = 17,910,717.98
  5. Step 5: Solve for x
    x = 17,910,717.98/3,807.76
  6. Step 6: Final answer
    x = 4,703.74

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1.5x scale

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.