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Finding the Fourth Proportional to 4,612.05, 6,920.10 and 2,145.60

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Solution

The fourth proportional to 4,612.05, 6,920.10 and 2,145.60 is: 3,219.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,612.05 : 6,920.10 = 2,145.60 : x
  2. Step 2: Convert to fraction form
    4,612.05/6,920.10 = 2,145.60/x
  3. Step 3: Cross multiply
    4,612.05x = 6,920.10 × 2,145.60
  4. Step 4: Simplify right side
    4,612.05x = 14,847,766.56
  5. Step 5: Solve for x
    x = 14,847,766.56/4,612.05
  6. Step 6: Final answer
    x = 3,219.34

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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.