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Finding the Fourth Proportional to 1,321.34, 1,982.16 and 541.16

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Solution

The fourth proportional to 1,321.34, 1,982.16 and 541.16 is: 811.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.34 : 1,982.16 = 541.16 : x
  2. Step 2: Convert to fraction form
    1,321.34/1,982.16 = 541.16/x
  3. Step 3: Cross multiply
    1,321.34x = 1,982.16 × 541.16
  4. Step 4: Simplify right side
    1,321.34x = 1,072,665.71
  5. Step 5: Solve for x
    x = 1,072,665.71/1,321.34
  6. Step 6: Final answer
    x = 811.80

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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.