Home / 1,961.56-2,709.08-1,217.30

Finding the Fourth Proportional to 1,961.56, 2,709.08 and 1,217.30

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Solution

The fourth proportional to 1,961.56, 2,709.08 and 1,217.30 is: 1,681.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,961.56 : 2,709.08 = 1,217.30 : x
  2. Step 2: Convert to fraction form
    1,961.56/2,709.08 = 1,217.30/x
  3. Step 3: Cross multiply
    1,961.56x = 2,709.08 × 1,217.30
  4. Step 4: Simplify right side
    1,961.56x = 3,297,748.02
  5. Step 5: Solve for x
    x = 3,297,748.02/1,961.56
  6. Step 6: Final answer
    x = 1,681.19

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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.