Home / 1,297.20-1,945.80-1,053.12

Finding the Fourth Proportional to 1,297.20, 1,945.80 and 1,053.12

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Solution

The fourth proportional to 1,297.20, 1,945.80 and 1,053.12 is: 1,579.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.20 : 1,945.80 = 1,053.12 : x
  2. Step 2: Convert to fraction form
    1,297.20/1,945.80 = 1,053.12/x
  3. Step 3: Cross multiply
    1,297.20x = 1,945.80 × 1,053.12
  4. Step 4: Simplify right side
    1,297.20x = 2,049,160.90
  5. Step 5: Solve for x
    x = 2,049,160.90/1,297.20
  6. Step 6: Final answer
    x = 1,579.68

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Similar ratio
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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.