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Finding the Fourth Proportional to 377.37, 520.51 and 321.21

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Solution

The fourth proportional to 377.37, 520.51 and 321.21 is: 443.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.37 : 520.51 = 321.21 : x
  2. Step 2: Convert to fraction form
    377.37/520.51 = 321.21/x
  3. Step 3: Cross multiply
    377.37x = 520.51 × 321.21
  4. Step 4: Simplify right side
    377.37x = 167,191.41
  5. Step 5: Solve for x
    x = 167,191.41/377.37
  6. Step 6: Final answer
    x = 443.04

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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.