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Finding the Fourth Proportional to 4,672.70, 6,999.60 and 2,912.30

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Solution

The fourth proportional to 4,672.70, 6,999.60 and 2,912.30 is: 4,362.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,672.70 : 6,999.60 = 2,912.30 : x
  2. Step 2: Convert to fraction form
    4,672.70/6,999.60 = 2,912.30/x
  3. Step 3: Cross multiply
    4,672.70x = 6,999.60 × 2,912.30
  4. Step 4: Simplify right side
    4,672.70x = 20,384,935.08
  5. Step 5: Solve for x
    x = 20,384,935.08/4,672.70
  6. Step 6: Final answer
    x = 4,362.56

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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.