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Finding the Fourth Proportional to 3,188.66, 4,780.91 and 1,108.50

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Solution

The fourth proportional to 3,188.66, 4,780.91 and 1,108.50 is: 1,662.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,188.66 : 4,780.91 = 1,108.50 : x
  2. Step 2: Convert to fraction form
    3,188.66/4,780.91 = 1,108.50/x
  3. Step 3: Cross multiply
    3,188.66x = 4,780.91 × 1,108.50
  4. Step 4: Simplify right side
    3,188.66x = 5,299,633.19
  5. Step 5: Solve for x
    x = 5,299,633.19/3,188.66
  6. Step 6: Final answer
    x = 1,662.03

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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.