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Finding the Fourth Proportional to 1,857.68, 2,787.08 and 1,199.84

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Solution

The fourth proportional to 1,857.68, 2,787.08 and 1,199.84 is: 1,800.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,857.68 : 2,787.08 = 1,199.84 : x
  2. Step 2: Convert to fraction form
    1,857.68/2,787.08 = 1,199.84/x
  3. Step 3: Cross multiply
    1,857.68x = 2,787.08 × 1,199.84
  4. Step 4: Simplify right side
    1,857.68x = 3,344,050.07
  5. Step 5: Solve for x
    x = 3,344,050.07/1,857.68
  6. Step 6: Final answer
    x = 1,800.12

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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.