Home / 1,331.02-1,996.56-406.60

Finding the Fourth Proportional to 1,331.02, 1,996.56 and 406.60

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Solution

The fourth proportional to 1,331.02, 1,996.56 and 406.60 is: 609.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.02 : 1,996.56 = 406.60 : x
  2. Step 2: Convert to fraction form
    1,331.02/1,996.56 = 406.60/x
  3. Step 3: Cross multiply
    1,331.02x = 1,996.56 × 406.60
  4. Step 4: Simplify right side
    1,331.02x = 811,801.30
  5. Step 5: Solve for x
    x = 811,801.30/1,331.02
  6. Step 6: Final answer
    x = 609.91

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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.