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Finding the Fourth Proportional to 1,306.39, 1,959.01 and 613.27

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Solution

The fourth proportional to 1,306.39, 1,959.01 and 613.27 is: 919.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.39 : 1,959.01 = 613.27 : x
  2. Step 2: Convert to fraction form
    1,306.39/1,959.01 = 613.27/x
  3. Step 3: Cross multiply
    1,306.39x = 1,959.01 × 613.27
  4. Step 4: Simplify right side
    1,306.39x = 1,201,395.63
  5. Step 5: Solve for x
    x = 1,201,395.63/1,306.39
  6. Step 6: Final answer
    x = 919.63

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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.