Home / 2,787.14-4,180.19-938.21

Finding the Fourth Proportional to 2,787.14, 4,180.19 and 938.21

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Solution

The fourth proportional to 2,787.14, 4,180.19 and 938.21 is: 1,407.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.14 : 4,180.19 = 938.21 : x
  2. Step 2: Convert to fraction form
    2,787.14/4,180.19 = 938.21/x
  3. Step 3: Cross multiply
    2,787.14x = 4,180.19 × 938.21
  4. Step 4: Simplify right side
    2,787.14x = 3,921,870.47
  5. Step 5: Solve for x
    x = 3,921,870.47/2,787.14
  6. Step 6: Final answer
    x = 1,407.13

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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.