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Finding the Fourth Proportional to 3,330.74, 4,995.97 and 865.37

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Solution

The fourth proportional to 3,330.74, 4,995.97 and 865.37 is: 1,298.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,330.74 : 4,995.97 = 865.37 : x
  2. Step 2: Convert to fraction form
    3,330.74/4,995.97 = 865.37/x
  3. Step 3: Cross multiply
    3,330.74x = 4,995.97 × 865.37
  4. Step 4: Simplify right side
    3,330.74x = 4,323,362.56
  5. Step 5: Solve for x
    x = 4,323,362.56/3,330.74
  6. Step 6: Final answer
    x = 1,298.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.