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Finding the Fourth Proportional to 6,318.79, 8,719.81 and 3,486.42

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Solution

The fourth proportional to 6,318.79, 8,719.81 and 3,486.42 is: 4,811.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,318.79 : 8,719.81 = 3,486.42 : x
  2. Step 2: Convert to fraction form
    6,318.79/8,719.81 = 3,486.42/x
  3. Step 3: Cross multiply
    6,318.79x = 8,719.81 × 3,486.42
  4. Step 4: Simplify right side
    6,318.79x = 30,400,919.98
  5. Step 5: Solve for x
    x = 30,400,919.98/6,318.79
  6. Step 6: Final answer
    x = 4,811.19

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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.