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Finding the Fourth Proportional to 1,786.39, 2,679.83 and 616.68

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Solution

The fourth proportional to 1,786.39, 2,679.83 and 616.68 is: 925.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786.39 : 2,679.83 = 616.68 : x
  2. Step 2: Convert to fraction form
    1,786.39/2,679.83 = 616.68/x
  3. Step 3: Cross multiply
    1,786.39x = 2,679.83 × 616.68
  4. Step 4: Simplify right side
    1,786.39x = 1,652,597.56
  5. Step 5: Solve for x
    x = 1,652,597.56/1,786.39
  6. Step 6: Final answer
    x = 925.10

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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.