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Finding the Fourth Proportional to 3,994.79, 5,507.43 and 2,798.16

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Solution

The fourth proportional to 3,994.79, 5,507.43 and 2,798.16 is: 3,857.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,994.79 : 5,507.43 = 2,798.16 : x
  2. Step 2: Convert to fraction form
    3,994.79/5,507.43 = 2,798.16/x
  3. Step 3: Cross multiply
    3,994.79x = 5,507.43 × 2,798.16
  4. Step 4: Simplify right side
    3,994.79x = 15,410,670.33
  5. Step 5: Solve for x
    x = 15,410,670.33/3,994.79
  6. Step 6: Final answer
    x = 3,857.69

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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.