Home / 3,240.32-4,856.72-1,388.64

Finding the Fourth Proportional to 3,240.32, 4,856.72 and 1,388.64

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Solution

The fourth proportional to 3,240.32, 4,856.72 and 1,388.64 is: 2,081.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,240.32 : 4,856.72 = 1,388.64 : x
  2. Step 2: Convert to fraction form
    3,240.32/4,856.72 = 1,388.64/x
  3. Step 3: Cross multiply
    3,240.32x = 4,856.72 × 1,388.64
  4. Step 4: Simplify right side
    3,240.32x = 6,744,235.66
  5. Step 5: Solve for x
    x = 6,744,235.66/3,240.32
  6. Step 6: Final answer
    x = 2,081.35

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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.