Home / 5,318.20-7,977.60-1,620.55

Finding the Fourth Proportional to 5,318.20, 7,977.60 and 1,620.55

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Solution

The fourth proportional to 5,318.20, 7,977.60 and 1,620.55 is: 2,430.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,318.20 : 7,977.60 = 1,620.55 : x
  2. Step 2: Convert to fraction form
    5,318.20/7,977.60 = 1,620.55/x
  3. Step 3: Cross multiply
    5,318.20x = 7,977.60 × 1,620.55
  4. Step 4: Simplify right side
    5,318.20x = 12,928,099.68
  5. Step 5: Solve for x
    x = 12,928,099.68/5,318.20
  6. Step 6: Final answer
    x = 2,430.92

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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.