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Finding the Fourth Proportional to 2,787.60, 4,176.60 and 1,469.40

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Solution

The fourth proportional to 2,787.60, 4,176.60 and 1,469.40 is: 2,201.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.60 : 4,176.60 = 1,469.40 : x
  2. Step 2: Convert to fraction form
    2,787.60/4,176.60 = 1,469.40/x
  3. Step 3: Cross multiply
    2,787.60x = 4,176.60 × 1,469.40
  4. Step 4: Simplify right side
    2,787.60x = 6,137,096.04
  5. Step 5: Solve for x
    x = 6,137,096.04/2,787.60
  6. Step 6: Final answer
    x = 2,201.57

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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.