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Finding the Fourth Proportional to 412.45, 618.37 and 266.36

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Solution

The fourth proportional to 412.45, 618.37 and 266.36 is: 399.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.45 : 618.37 = 266.36 : x
  2. Step 2: Convert to fraction form
    412.45/618.37 = 266.36/x
  3. Step 3: Cross multiply
    412.45x = 618.37 × 266.36
  4. Step 4: Simplify right side
    412.45x = 164,709.03
  5. Step 5: Solve for x
    x = 164,709.03/412.45
  6. Step 6: Final answer
    x = 399.34

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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.