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Finding the Fourth Proportional to 3,803.60, 5,246.16 and 2,405

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Solution

The fourth proportional to 3,803.60, 5,246.16 and 2,405 is: 3,317.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,803.60 : 5,246.16 = 2,405 : x
  2. Step 2: Convert to fraction form
    3,803.60/5,246.16 = 2,405/x
  3. Step 3: Cross multiply
    3,803.60x = 5,246.16 × 2,405
  4. Step 4: Simplify right side
    3,803.60x = 12,617,014.80
  5. Step 5: Solve for x
    x = 12,617,014.80/3,803.60
  6. Step 6: Final answer
    x = 3,317.12

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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.