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Finding the Fourth Proportional to 3,855.14, 5,776.65 and 2,979.79

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Solution

The fourth proportional to 3,855.14, 5,776.65 and 2,979.79 is: 4,465.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.14 : 5,776.65 = 2,979.79 : x
  2. Step 2: Convert to fraction form
    3,855.14/5,776.65 = 2,979.79/x
  3. Step 3: Cross multiply
    3,855.14x = 5,776.65 × 2,979.79
  4. Step 4: Simplify right side
    3,855.14x = 17,213,182.47
  5. Step 5: Solve for x
    x = 17,213,182.47/3,855.14
  6. Step 6: Final answer
    x = 4,465.00

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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.