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Finding the Fourth Proportional to 3,188.16, 4,787.10 and 2,643.84

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Solution

The fourth proportional to 3,188.16, 4,787.10 and 2,643.84 is: 3,969.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,188.16 : 4,787.10 = 2,643.84 : x
  2. Step 2: Convert to fraction form
    3,188.16/4,787.10 = 2,643.84/x
  3. Step 3: Cross multiply
    3,188.16x = 4,787.10 × 2,643.84
  4. Step 4: Simplify right side
    3,188.16x = 12,656,326.46
  5. Step 5: Solve for x
    x = 12,656,326.46/3,188.16
  6. Step 6: Final answer
    x = 3,969.79

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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.