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Finding the Fourth Proportional to 3,867.32, 5,335.64 and 2,188.56

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Solution

The fourth proportional to 3,867.32, 5,335.64 and 2,188.56 is: 3,019.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,867.32 : 5,335.64 = 2,188.56 : x
  2. Step 2: Convert to fraction form
    3,867.32/5,335.64 = 2,188.56/x
  3. Step 3: Cross multiply
    3,867.32x = 5,335.64 × 2,188.56
  4. Step 4: Simplify right side
    3,867.32x = 11,677,368.28
  5. Step 5: Solve for x
    x = 11,677,368.28/3,867.32
  6. Step 6: Final answer
    x = 3,019.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.