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Finding the Fourth Proportional to 2,787.18, 4,179.12 and 937.80

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Solution

The fourth proportional to 2,787.18, 4,179.12 and 937.80 is: 1,406.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.18 : 4,179.12 = 937.80 : x
  2. Step 2: Convert to fraction form
    2,787.18/4,179.12 = 937.80/x
  3. Step 3: Cross multiply
    2,787.18x = 4,179.12 × 937.80
  4. Step 4: Simplify right side
    2,787.18x = 3,919,178.74
  5. Step 5: Solve for x
    x = 3,919,178.74/2,787.18
  6. Step 6: Final answer
    x = 1,406.14

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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.