Home / 4,747.55-7,121.32-1,284.80

Finding the Fourth Proportional to 4,747.55, 7,121.32 and 1,284.80

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Solution

The fourth proportional to 4,747.55, 7,121.32 and 1,284.80 is: 1,927.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,747.55 : 7,121.32 = 1,284.80 : x
  2. Step 2: Convert to fraction form
    4,747.55/7,121.32 = 1,284.80/x
  3. Step 3: Cross multiply
    4,747.55x = 7,121.32 × 1,284.80
  4. Step 4: Simplify right side
    4,747.55x = 9,149,471.94
  5. Step 5: Solve for x
    x = 9,149,471.94/4,747.55
  6. Step 6: Final answer
    x = 1,927.20

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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.