Home / 1,372.50-2,059.70-1,189.71

Finding the Fourth Proportional to 1,372.50, 2,059.70 and 1,189.71

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Solution

The fourth proportional to 1,372.50, 2,059.70 and 1,189.71 is: 1,785.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.50 : 2,059.70 = 1,189.71 : x
  2. Step 2: Convert to fraction form
    1,372.50/2,059.70 = 1,189.71/x
  3. Step 3: Cross multiply
    1,372.50x = 2,059.70 × 1,189.71
  4. Step 4: Simplify right side
    1,372.50x = 2,450,445.69
  5. Step 5: Solve for x
    x = 2,450,445.69/1,372.50
  6. Step 6: Final answer
    x = 1,785.39

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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.