Home / 1,321.16-1,982.65-1,310.91

Finding the Fourth Proportional to 1,321.16, 1,982.65 and 1,310.91

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Solution

The fourth proportional to 1,321.16, 1,982.65 and 1,310.91 is: 1,967.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.16 : 1,982.65 = 1,310.91 : x
  2. Step 2: Convert to fraction form
    1,321.16/1,982.65 = 1,310.91/x
  3. Step 3: Cross multiply
    1,321.16x = 1,982.65 × 1,310.91
  4. Step 4: Simplify right side
    1,321.16x = 2,599,076.72
  5. Step 5: Solve for x
    x = 2,599,076.72/1,321.16
  6. Step 6: Final answer
    x = 1,967.27

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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.