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Finding the Fourth Proportional to 3,980.69, 5,970.58 and 1,059.22

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Solution

The fourth proportional to 3,980.69, 5,970.58 and 1,059.22 is: 1,588.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.69 : 5,970.58 = 1,059.22 : x
  2. Step 2: Convert to fraction form
    3,980.69/5,970.58 = 1,059.22/x
  3. Step 3: Cross multiply
    3,980.69x = 5,970.58 × 1,059.22
  4. Step 4: Simplify right side
    3,980.69x = 6,324,157.75
  5. Step 5: Solve for x
    x = 6,324,157.75/3,980.69
  6. Step 6: Final answer
    x = 1,588.71

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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.