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Finding the Fourth Proportional to 503.70, 694.89 and 379.50

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Solution

The fourth proportional to 503.70, 694.89 and 379.50 is: 523.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.70 : 694.89 = 379.50 : x
  2. Step 2: Convert to fraction form
    503.70/694.89 = 379.50/x
  3. Step 3: Cross multiply
    503.70x = 694.89 × 379.50
  4. Step 4: Simplify right side
    503.70x = 263,710.76
  5. Step 5: Solve for x
    x = 263,710.76/503.70
  6. Step 6: Final answer
    x = 523.55

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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.