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Finding the Fourth Proportional to 3,147.40, 4,723.02 and 1,299.40

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Solution

The fourth proportional to 3,147.40, 4,723.02 and 1,299.40 is: 1,949.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147.40 : 4,723.02 = 1,299.40 : x
  2. Step 2: Convert to fraction form
    3,147.40/4,723.02 = 1,299.40/x
  3. Step 3: Cross multiply
    3,147.40x = 4,723.02 × 1,299.40
  4. Step 4: Simplify right side
    3,147.40x = 6,137,092.19
  5. Step 5: Solve for x
    x = 6,137,092.19/3,147.40
  6. Step 6: Final answer
    x = 1,949.89

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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.