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Finding the Fourth Proportional to 1,331.56, 1,837.26 and 771.91

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Solution

The fourth proportional to 1,331.56, 1,837.26 and 771.91 is: 1,065.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.56 : 1,837.26 = 771.91 : x
  2. Step 2: Convert to fraction form
    1,331.56/1,837.26 = 771.91/x
  3. Step 3: Cross multiply
    1,331.56x = 1,837.26 × 771.91
  4. Step 4: Simplify right side
    1,331.56x = 1,418,199.37
  5. Step 5: Solve for x
    x = 1,418,199.37/1,331.56
  6. Step 6: Final answer
    x = 1,065.07

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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.