Home / 1,372.12-2,053.38-851.80

Finding the Fourth Proportional to 1,372.12, 2,053.38 and 851.80

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Solution

The fourth proportional to 1,372.12, 2,053.38 and 851.80 is: 1,274.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.12 : 2,053.38 = 851.80 : x
  2. Step 2: Convert to fraction form
    1,372.12/2,053.38 = 851.80/x
  3. Step 3: Cross multiply
    1,372.12x = 2,053.38 × 851.80
  4. Step 4: Simplify right side
    1,372.12x = 1,749,069.08
  5. Step 5: Solve for x
    x = 1,749,069.08/1,372.12
  6. Step 6: Final answer
    x = 1,274.72

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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.