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Finding the Fourth Proportional to 1,343.82, 2,015.28 and 613.00

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Solution

The fourth proportional to 1,343.82, 2,015.28 and 613.00 is: 919.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,343.82 : 2,015.28 = 613.00 : x
  2. Step 2: Convert to fraction form
    1,343.82/2,015.28 = 613.00/x
  3. Step 3: Cross multiply
    1,343.82x = 2,015.28 × 613.00
  4. Step 4: Simplify right side
    1,343.82x = 1,235,369.16
  5. Step 5: Solve for x
    x = 1,235,369.16/1,343.82
  6. Step 6: Final answer
    x = 919.29

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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.