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Finding the Fourth Proportional to 3,108.50, 4,662.80 and 800

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Solution

The fourth proportional to 3,108.50, 4,662.80 and 800 is: 1,200.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.50 : 4,662.80 = 800 : x
  2. Step 2: Convert to fraction form
    3,108.50/4,662.80 = 800/x
  3. Step 3: Cross multiply
    3,108.50x = 4,662.80 × 800
  4. Step 4: Simplify right side
    3,108.50x = 3,730,236
  5. Step 5: Solve for x
    x = 3,730,236/3,108.50
  6. Step 6: Final answer
    x = 1,200.01

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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.