Home / 1,321.92-1,816.40-1,308.48

Finding the Fourth Proportional to 1,321.92, 1,816.40 and 1,308.48

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Solution

The fourth proportional to 1,321.92, 1,816.40 and 1,308.48 is: 1,797.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.92 : 1,816.40 = 1,308.48 : x
  2. Step 2: Convert to fraction form
    1,321.92/1,816.40 = 1,308.48/x
  3. Step 3: Cross multiply
    1,321.92x = 1,816.40 × 1,308.48
  4. Step 4: Simplify right side
    1,321.92x = 2,376,723.07
  5. Step 5: Solve for x
    x = 2,376,723.07/1,321.92
  6. Step 6: Final answer
    x = 1,797.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.