Home / 2,315.92-3,195.78-1,321.01

Finding the Fourth Proportional to 2,315.92, 3,195.78 and 1,321.01

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Solution

The fourth proportional to 2,315.92, 3,195.78 and 1,321.01 is: 1,822.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,315.92 : 3,195.78 = 1,321.01 : x
  2. Step 2: Convert to fraction form
    2,315.92/3,195.78 = 1,321.01/x
  3. Step 3: Cross multiply
    2,315.92x = 3,195.78 × 1,321.01
  4. Step 4: Simplify right side
    2,315.92x = 4,221,657.34
  5. Step 5: Solve for x
    x = 4,221,657.34/2,315.92
  6. Step 6: Final answer
    x = 1,822.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.