Home / 1,985.10-2,974.05-1,214.70

Finding the Fourth Proportional to 1,985.10, 2,974.05 and 1,214.70

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Solution

The fourth proportional to 1,985.10, 2,974.05 and 1,214.70 is: 1,819.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.10 : 2,974.05 = 1,214.70 : x
  2. Step 2: Convert to fraction form
    1,985.10/2,974.05 = 1,214.70/x
  3. Step 3: Cross multiply
    1,985.10x = 2,974.05 × 1,214.70
  4. Step 4: Simplify right side
    1,985.10x = 3,612,578.54
  5. Step 5: Solve for x
    x = 3,612,578.54/1,985.10
  6. Step 6: Final answer
    x = 1,819.85

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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.