Home / 1,343.30-2,015.40-757.60

Finding the Fourth Proportional to 1,343.30, 2,015.40 and 757.60

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Solution

The fourth proportional to 1,343.30, 2,015.40 and 757.60 is: 1,136.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,343.30 : 2,015.40 = 757.60 : x
  2. Step 2: Convert to fraction form
    1,343.30/2,015.40 = 757.60/x
  3. Step 3: Cross multiply
    1,343.30x = 2,015.40 × 757.60
  4. Step 4: Simplify right side
    1,343.30x = 1,526,867.04
  5. Step 5: Solve for x
    x = 1,526,867.04/1,343.30
  6. Step 6: Final answer
    x = 1,136.65

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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.