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Finding the Fourth Proportional to 1,857.65, 2,787.60 and 1,079.18

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Solution

The fourth proportional to 1,857.65, 2,787.60 and 1,079.18 is: 1,619.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,857.65 : 2,787.60 = 1,079.18 : x
  2. Step 2: Convert to fraction form
    1,857.65/2,787.60 = 1,079.18/x
  3. Step 3: Cross multiply
    1,857.65x = 2,787.60 × 1,079.18
  4. Step 4: Simplify right side
    1,857.65x = 3,008,308.23
  5. Step 5: Solve for x
    x = 3,008,308.23/1,857.65
  6. Step 6: Final answer
    x = 1,619.42

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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.