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Finding the Fourth Proportional to 1,787.95, 2,680.48 and 748.75

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Solution

The fourth proportional to 1,787.95, 2,680.48 and 748.75 is: 1,122.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.95 : 2,680.48 = 748.75 : x
  2. Step 2: Convert to fraction form
    1,787.95/2,680.48 = 748.75/x
  3. Step 3: Cross multiply
    1,787.95x = 2,680.48 × 748.75
  4. Step 4: Simplify right side
    1,787.95x = 2,007,009.40
  5. Step 5: Solve for x
    x = 2,007,009.40/1,787.95
  6. Step 6: Final answer
    x = 1,122.52

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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.