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Finding the Fourth Proportional to 1,331.79, 1,837.56 and 800.43

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Solution

The fourth proportional to 1,331.79, 1,837.56 and 800.43 is: 1,104.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.79 : 1,837.56 = 800.43 : x
  2. Step 2: Convert to fraction form
    1,331.79/1,837.56 = 800.43/x
  3. Step 3: Cross multiply
    1,331.79x = 1,837.56 × 800.43
  4. Step 4: Simplify right side
    1,331.79x = 1,470,838.15
  5. Step 5: Solve for x
    x = 1,470,838.15/1,331.79
  6. Step 6: Final answer
    x = 1,104.41

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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.