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Finding the Fourth Proportional to 2,850, 3,930.30 and 1,856.04

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Solution

The fourth proportional to 2,850, 3,930.30 and 1,856.04 is: 2,559.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,850 : 3,930.30 = 1,856.04 : x
  2. Step 2: Convert to fraction form
    2,850/3,930.30 = 1,856.04/x
  3. Step 3: Cross multiply
    2,850x = 3,930.30 × 1,856.04
  4. Step 4: Simplify right side
    2,850x = 7,294,794.01
  5. Step 5: Solve for x
    x = 7,294,794.01/2,850
  6. Step 6: Final answer
    x = 2,559.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.