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Finding the Fourth Proportional to 1,331.30, 1,837.24 and 741.80

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Solution

The fourth proportional to 1,331.30, 1,837.24 and 741.80 is: 1,023.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.30 : 1,837.24 = 741.80 : x
  2. Step 2: Convert to fraction form
    1,331.30/1,837.24 = 741.80/x
  3. Step 3: Cross multiply
    1,331.30x = 1,837.24 × 741.80
  4. Step 4: Simplify right side
    1,331.30x = 1,362,864.63
  5. Step 5: Solve for x
    x = 1,362,864.63/1,331.30
  6. Step 6: Final answer
    x = 1,023.71

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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.