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Finding the Fourth Proportional to 1,331.26, 1,836.80 and 741.66

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Solution

The fourth proportional to 1,331.26, 1,836.80 and 741.66 is: 1,023.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.26 : 1,836.80 = 741.66 : x
  2. Step 2: Convert to fraction form
    1,331.26/1,836.80 = 741.66/x
  3. Step 3: Cross multiply
    1,331.26x = 1,836.80 × 741.66
  4. Step 4: Simplify right side
    1,331.26x = 1,362,281.09
  5. Step 5: Solve for x
    x = 1,362,281.09/1,331.26
  6. Step 6: Final answer
    x = 1,023.30

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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.