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Finding the Fourth Proportional to 1,324.45, 1,828.07 and 764.98

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Solution

The fourth proportional to 1,324.45, 1,828.07 and 764.98 is: 1,055.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324.45 : 1,828.07 = 764.98 : x
  2. Step 2: Convert to fraction form
    1,324.45/1,828.07 = 764.98/x
  3. Step 3: Cross multiply
    1,324.45x = 1,828.07 × 764.98
  4. Step 4: Simplify right side
    1,324.45x = 1,398,431.46
  5. Step 5: Solve for x
    x = 1,398,431.46/1,324.45
  6. Step 6: Final answer
    x = 1,055.86

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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.