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Finding the Fourth Proportional to 503.45, 694.83 and 378.91

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Solution

The fourth proportional to 503.45, 694.83 and 378.91 is: 522.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.45 : 694.83 = 378.91 : x
  2. Step 2: Convert to fraction form
    503.45/694.83 = 378.91/x
  3. Step 3: Cross multiply
    503.45x = 694.83 × 378.91
  4. Step 4: Simplify right side
    503.45x = 263,278.04
  5. Step 5: Solve for x
    x = 263,278.04/503.45
  6. Step 6: Final answer
    x = 522.95

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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.