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Finding the Fourth Proportional to 3,640.79, 5,453.62 and 2,318.00

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Solution

The fourth proportional to 3,640.79, 5,453.62 and 2,318.00 is: 3,472.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,640.79 : 5,453.62 = 2,318.00 : x
  2. Step 2: Convert to fraction form
    3,640.79/5,453.62 = 2,318.00/x
  3. Step 3: Cross multiply
    3,640.79x = 5,453.62 × 2,318.00
  4. Step 4: Simplify right side
    3,640.79x = 12,641,487.24
  5. Step 5: Solve for x
    x = 12,641,487.24/3,640.79
  6. Step 6: Final answer
    x = 3,472.18

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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.