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Finding the Fourth Proportional to 4,750.47, 7,121.88 and 1,787.22

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Solution

The fourth proportional to 4,750.47, 7,121.88 and 1,787.22 is: 2,679.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,750.47 : 7,121.88 = 1,787.22 : x
  2. Step 2: Convert to fraction form
    4,750.47/7,121.88 = 1,787.22/x
  3. Step 3: Cross multiply
    4,750.47x = 7,121.88 × 1,787.22
  4. Step 4: Simplify right side
    4,750.47x = 12,728,366.37
  5. Step 5: Solve for x
    x = 12,728,366.37/4,750.47
  6. Step 6: Final answer
    x = 2,679.39

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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.