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Finding the Fourth Proportional to 2,734.70, 4,102.05 and 787.07

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Solution

The fourth proportional to 2,734.70, 4,102.05 and 787.07 is: 1,180.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,734.70 : 4,102.05 = 787.07 : x
  2. Step 2: Convert to fraction form
    2,734.70/4,102.05 = 787.07/x
  3. Step 3: Cross multiply
    2,734.70x = 4,102.05 × 787.07
  4. Step 4: Simplify right side
    2,734.70x = 3,228,600.49
  5. Step 5: Solve for x
    x = 3,228,600.49/2,734.70
  6. Step 6: Final answer
    x = 1,180.61

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1.5x scale

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.