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Finding the Fourth Proportional to 3,861.60, 5,795.10 and 1,671.90

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Solution

The fourth proportional to 3,861.60, 5,795.10 and 1,671.90 is: 2,509.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,861.60 : 5,795.10 = 1,671.90 : x
  2. Step 2: Convert to fraction form
    3,861.60/5,795.10 = 1,671.90/x
  3. Step 3: Cross multiply
    3,861.60x = 5,795.10 × 1,671.90
  4. Step 4: Simplify right side
    3,861.60x = 9,688,827.69
  5. Step 5: Solve for x
    x = 9,688,827.69/3,861.60
  6. Step 6: Final answer
    x = 2,509.02

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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.