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Finding the Fourth Proportional to 441.08, 661.02 and 312.56

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Solution

The fourth proportional to 441.08, 661.02 and 312.56 is: 468.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.08 : 661.02 = 312.56 : x
  2. Step 2: Convert to fraction form
    441.08/661.02 = 312.56/x
  3. Step 3: Cross multiply
    441.08x = 661.02 × 312.56
  4. Step 4: Simplify right side
    441.08x = 206,608.41
  5. Step 5: Solve for x
    x = 206,608.41/441.08
  6. Step 6: Final answer
    x = 468.41

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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.