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Finding the Fourth Proportional to 3,987.77, 5,979.15 and 2,893.05

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Solution

The fourth proportional to 3,987.77, 5,979.15 and 2,893.05 is: 4,337.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.77 : 5,979.15 = 2,893.05 : x
  2. Step 2: Convert to fraction form
    3,987.77/5,979.15 = 2,893.05/x
  3. Step 3: Cross multiply
    3,987.77x = 5,979.15 × 2,893.05
  4. Step 4: Simplify right side
    3,987.77x = 17,297,979.91
  5. Step 5: Solve for x
    x = 17,297,979.91/3,987.77
  6. Step 6: Final answer
    x = 4,337.76

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1.5x scale

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.