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Finding the Fourth Proportional to 1,787.62, 2,681.14 and 488.78

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Solution

The fourth proportional to 1,787.62, 2,681.14 and 488.78 is: 733.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.62 : 2,681.14 = 488.78 : x
  2. Step 2: Convert to fraction form
    1,787.62/2,681.14 = 488.78/x
  3. Step 3: Cross multiply
    1,787.62x = 2,681.14 × 488.78
  4. Step 4: Simplify right side
    1,787.62x = 1,310,487.60
  5. Step 5: Solve for x
    x = 1,310,487.60/1,787.62
  6. Step 6: Final answer
    x = 733.09

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.