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Finding the Fourth Proportional to 1,786.72, 2,679.96 and 616.48

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Solution

The fourth proportional to 1,786.72, 2,679.96 and 616.48 is: 924.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786.72 : 2,679.96 = 616.48 : x
  2. Step 2: Convert to fraction form
    1,786.72/2,679.96 = 616.48/x
  3. Step 3: Cross multiply
    1,786.72x = 2,679.96 × 616.48
  4. Step 4: Simplify right side
    1,786.72x = 1,652,141.74
  5. Step 5: Solve for x
    x = 1,652,141.74/1,786.72
  6. Step 6: Final answer
    x = 924.68

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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.