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Finding the Fourth Proportional to 1,331.52, 1,837.59 and 742.23

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Solution

The fourth proportional to 1,331.52, 1,837.59 and 742.23 is: 1,024.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.52 : 1,837.59 = 742.23 : x
  2. Step 2: Convert to fraction form
    1,331.52/1,837.59 = 742.23/x
  3. Step 3: Cross multiply
    1,331.52x = 1,837.59 × 742.23
  4. Step 4: Simplify right side
    1,331.52x = 1,363,914.43
  5. Step 5: Solve for x
    x = 1,363,914.43/1,331.52
  6. Step 6: Final answer
    x = 1,024.33

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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.