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Finding the Fourth Proportional to 3,188.76, 4,783.14 and 1,213.92

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Solution

The fourth proportional to 3,188.76, 4,783.14 and 1,213.92 is: 1,820.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,188.76 : 4,783.14 = 1,213.92 : x
  2. Step 2: Convert to fraction form
    3,188.76/4,783.14 = 1,213.92/x
  3. Step 3: Cross multiply
    3,188.76x = 4,783.14 × 1,213.92
  4. Step 4: Simplify right side
    3,188.76x = 5,806,349.31
  5. Step 5: Solve for x
    x = 5,806,349.31/3,188.76
  6. Step 6: Final answer
    x = 1,820.88

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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.