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Finding the Fourth Proportional to 6,491.40, 9,738.18 and 3,203.88

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Solution

The fourth proportional to 6,491.40, 9,738.18 and 3,203.88 is: 4,806.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,491.40 : 9,738.18 = 3,203.88 : x
  2. Step 2: Convert to fraction form
    6,491.40/9,738.18 = 3,203.88/x
  3. Step 3: Cross multiply
    6,491.40x = 9,738.18 × 3,203.88
  4. Step 4: Simplify right side
    6,491.40x = 31,199,960.14
  5. Step 5: Solve for x
    x = 31,199,960.14/6,491.40
  6. Step 6: Final answer
    x = 4,806.35

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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.