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Finding the Fourth Proportional to 3,422.72, 4,723.47 and 1,930.67

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Solution

The fourth proportional to 3,422.72, 4,723.47 and 1,930.67 is: 2,664.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,422.72 : 4,723.47 = 1,930.67 : x
  2. Step 2: Convert to fraction form
    3,422.72/4,723.47 = 1,930.67/x
  3. Step 3: Cross multiply
    3,422.72x = 4,723.47 × 1,930.67
  4. Step 4: Simplify right side
    3,422.72x = 9,119,438.21
  5. Step 5: Solve for x
    x = 9,119,438.21/3,422.72
  6. Step 6: Final answer
    x = 2,664.39

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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.