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Finding the Fourth Proportional to 377.80, 520.79 and 284.85

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Solution

The fourth proportional to 377.80, 520.79 and 284.85 is: 392.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.80 : 520.79 = 284.85 : x
  2. Step 2: Convert to fraction form
    377.80/520.79 = 284.85/x
  3. Step 3: Cross multiply
    377.80x = 520.79 × 284.85
  4. Step 4: Simplify right side
    377.80x = 148,347.03
  5. Step 5: Solve for x
    x = 148,347.03/377.80
  6. Step 6: Final answer
    x = 392.66

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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.