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Finding the Fourth Proportional to 6,318.90, 8,719.71 and 3,485.70

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Solution

The fourth proportional to 6,318.90, 8,719.71 and 3,485.70 is: 4,810.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,318.90 : 8,719.71 = 3,485.70 : x
  2. Step 2: Convert to fraction form
    6,318.90/8,719.71 = 3,485.70/x
  3. Step 3: Cross multiply
    6,318.90x = 8,719.71 × 3,485.70
  4. Step 4: Simplify right side
    6,318.90x = 30,394,293.15
  5. Step 5: Solve for x
    x = 30,394,293.15/6,318.90
  6. Step 6: Final answer
    x = 4,810.06

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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.