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Finding the Fourth Proportional to 3,920.32, 5,807.12 and 3,876.64

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Solution

The fourth proportional to 3,920.32, 5,807.12 and 3,876.64 is: 5,742.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.32 : 5,807.12 = 3,876.64 : x
  2. Step 2: Convert to fraction form
    3,920.32/5,807.12 = 3,876.64/x
  3. Step 3: Cross multiply
    3,920.32x = 5,807.12 × 3,876.64
  4. Step 4: Simplify right side
    3,920.32x = 22,512,113.68
  5. Step 5: Solve for x
    x = 22,512,113.68/3,920.32
  6. Step 6: Final answer
    x = 5,742.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.