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Finding the Fourth Proportional to 1,343.46, 2,015.21 and 613.24

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Solution

The fourth proportional to 1,343.46, 2,015.21 and 613.24 is: 919.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,343.46 : 2,015.21 = 613.24 : x
  2. Step 2: Convert to fraction form
    1,343.46/2,015.21 = 613.24/x
  3. Step 3: Cross multiply
    1,343.46x = 2,015.21 × 613.24
  4. Step 4: Simplify right side
    1,343.46x = 1,235,807.38
  5. Step 5: Solve for x
    x = 1,235,807.38/1,343.46
  6. Step 6: Final answer
    x = 919.87

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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.