Home / 1,985.28-2,977.90-1,109.09

Finding the Fourth Proportional to 1,985.28, 2,977.90 and 1,109.09

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Solution

The fourth proportional to 1,985.28, 2,977.90 and 1,109.09 is: 1,663.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.28 : 2,977.90 = 1,109.09 : x
  2. Step 2: Convert to fraction form
    1,985.28/2,977.90 = 1,109.09/x
  3. Step 3: Cross multiply
    1,985.28x = 2,977.90 × 1,109.09
  4. Step 4: Simplify right side
    1,985.28x = 3,302,763.78
  5. Step 5: Solve for x
    x = 3,302,763.78/1,985.28
  6. Step 6: Final answer
    x = 1,663.63

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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.