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Finding the Fourth Proportional to 3,343.40, 5,015.40 and 1,395.20

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Solution

The fourth proportional to 3,343.40, 5,015.40 and 1,395.20 is: 2,092.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,343.40 : 5,015.40 = 1,395.20 : x
  2. Step 2: Convert to fraction form
    3,343.40/5,015.40 = 1,395.20/x
  3. Step 3: Cross multiply
    3,343.40x = 5,015.40 × 1,395.20
  4. Step 4: Simplify right side
    3,343.40x = 6,997,486.08
  5. Step 5: Solve for x
    x = 6,997,486.08/3,343.40
  6. Step 6: Final answer
    x = 2,092.93

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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.