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Finding the Fourth Proportional to 3,252.38, 4,878.59 and 787.21

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Solution

The fourth proportional to 3,252.38, 4,878.59 and 787.21 is: 1,180.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,252.38 : 4,878.59 = 787.21 : x
  2. Step 2: Convert to fraction form
    3,252.38/4,878.59 = 787.21/x
  3. Step 3: Cross multiply
    3,252.38x = 4,878.59 × 787.21
  4. Step 4: Simplify right side
    3,252.38x = 3,840,458.70
  5. Step 5: Solve for x
    x = 3,840,458.70/3,252.38
  6. Step 6: Final answer
    x = 1,180.82

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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.