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Finding the Fourth Proportional to 1,858.67, 2,787.78 and 1,079.10

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Solution

The fourth proportional to 1,858.67, 2,787.78 and 1,079.10 is: 1,618.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,858.67 : 2,787.78 = 1,079.10 : x
  2. Step 2: Convert to fraction form
    1,858.67/2,787.78 = 1,079.10/x
  3. Step 3: Cross multiply
    1,858.67x = 2,787.78 × 1,079.10
  4. Step 4: Simplify right side
    1,858.67x = 3,008,274.06
  5. Step 5: Solve for x
    x = 3,008,274.06/1,858.67
  6. Step 6: Final answer
    x = 1,618.51

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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.