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Finding the Fourth Proportional to 3,586.56, 5,379.84 and 1,640.40

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Solution

The fourth proportional to 3,586.56, 5,379.84 and 1,640.40 is: 2,460.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,586.56 : 5,379.84 = 1,640.40 : x
  2. Step 2: Convert to fraction form
    3,586.56/5,379.84 = 1,640.40/x
  3. Step 3: Cross multiply
    3,586.56x = 5,379.84 × 1,640.40
  4. Step 4: Simplify right side
    3,586.56x = 8,825,089.54
  5. Step 5: Solve for x
    x = 8,825,089.54/3,586.56
  6. Step 6: Final answer
    x = 2,460.60

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1.5x scale

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.