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Finding the Fourth Proportional to 3,429.60, 4,729.60 and 2,491.60

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Solution

The fourth proportional to 3,429.60, 4,729.60 and 2,491.60 is: 3,436.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,429.60 : 4,729.60 = 2,491.60 : x
  2. Step 2: Convert to fraction form
    3,429.60/4,729.60 = 2,491.60/x
  3. Step 3: Cross multiply
    3,429.60x = 4,729.60 × 2,491.60
  4. Step 4: Simplify right side
    3,429.60x = 11,784,271.36
  5. Step 5: Solve for x
    x = 11,784,271.36/3,429.60
  6. Step 6: Final answer
    x = 3,436.05

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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.