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Finding the Fourth Proportional to 377.20, 520.20 and 303.46

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Solution

The fourth proportional to 377.20, 520.20 and 303.46 is: 418.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.20 : 520.20 = 303.46 : x
  2. Step 2: Convert to fraction form
    377.20/520.20 = 303.46/x
  3. Step 3: Cross multiply
    377.20x = 520.20 × 303.46
  4. Step 4: Simplify right side
    377.20x = 157,859.89
  5. Step 5: Solve for x
    x = 157,859.89/377.20
  6. Step 6: Final answer
    x = 418.50

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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.