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Finding the Fourth Proportional to 503.38, 694.97 and 398.89

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Solution

The fourth proportional to 503.38, 694.97 and 398.89 is: 550.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.38 : 694.97 = 398.89 : x
  2. Step 2: Convert to fraction form
    503.38/694.97 = 398.89/x
  3. Step 3: Cross multiply
    503.38x = 694.97 × 398.89
  4. Step 4: Simplify right side
    503.38x = 277,216.58
  5. Step 5: Solve for x
    x = 277,216.58/503.38
  6. Step 6: Final answer
    x = 550.71

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1.5x scale

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.