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Finding the Fourth Proportional to 3,992.01, 5,509.80 and 2,398.74

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Solution

The fourth proportional to 3,992.01, 5,509.80 and 2,398.74 is: 3,310.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.01 : 5,509.80 = 2,398.74 : x
  2. Step 2: Convert to fraction form
    3,992.01/5,509.80 = 2,398.74/x
  3. Step 3: Cross multiply
    3,992.01x = 5,509.80 × 2,398.74
  4. Step 4: Simplify right side
    3,992.01x = 13,216,577.65
  5. Step 5: Solve for x
    x = 13,216,577.65/3,992.01
  6. Step 6: Final answer
    x = 3,310.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.