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Finding the Fourth Proportional to 2,787.71, 4,181.96 and 840.06

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Solution

The fourth proportional to 2,787.71, 4,181.96 and 840.06 is: 1,260.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.71 : 4,181.96 = 840.06 : x
  2. Step 2: Convert to fraction form
    2,787.71/4,181.96 = 840.06/x
  3. Step 3: Cross multiply
    2,787.71x = 4,181.96 × 840.06
  4. Step 4: Simplify right side
    2,787.71x = 3,513,093.12
  5. Step 5: Solve for x
    x = 3,513,093.12/2,787.71
  6. Step 6: Final answer
    x = 1,260.21

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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.