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Finding the Fourth Proportional to 1,344.48, 2,015.91 and 613.37

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Solution

The fourth proportional to 1,344.48, 2,015.91 and 613.37 is: 919.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,344.48 : 2,015.91 = 613.37 : x
  2. Step 2: Convert to fraction form
    1,344.48/2,015.91 = 613.37/x
  3. Step 3: Cross multiply
    1,344.48x = 2,015.91 × 613.37
  4. Step 4: Simplify right side
    1,344.48x = 1,236,488.64
  5. Step 5: Solve for x
    x = 1,236,488.64/1,344.48
  6. Step 6: Final answer
    x = 919.68

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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.