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Finding the Fourth Proportional to 4,679.76, 7,020.72 and 2,491.68

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Solution

The fourth proportional to 4,679.76, 7,020.72 and 2,491.68 is: 3,738.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,679.76 : 7,020.72 = 2,491.68 : x
  2. Step 2: Convert to fraction form
    4,679.76/7,020.72 = 2,491.68/x
  3. Step 3: Cross multiply
    4,679.76x = 7,020.72 × 2,491.68
  4. Step 4: Simplify right side
    4,679.76x = 17,493,387.61
  5. Step 5: Solve for x
    x = 17,493,387.61/4,679.76
  6. Step 6: Final answer
    x = 3,738.10

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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.