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Finding the Fourth Proportional to 4,890.11, 7,321.84 and 3,405.69

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Solution

The fourth proportional to 4,890.11, 7,321.84 and 3,405.69 is: 5,099.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,890.11 : 7,321.84 = 3,405.69 : x
  2. Step 2: Convert to fraction form
    4,890.11/7,321.84 = 3,405.69/x
  3. Step 3: Cross multiply
    4,890.11x = 7,321.84 × 3,405.69
  4. Step 4: Simplify right side
    4,890.11x = 24,935,907.32
  5. Step 5: Solve for x
    x = 24,935,907.32/4,890.11
  6. Step 6: Final answer
    x = 5,099.25

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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.