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Finding the Fourth Proportional to 613.99, 847 and 377.74

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Solution

The fourth proportional to 613.99, 847 and 377.74 is: 521.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.99 : 847 = 377.74 : x
  2. Step 2: Convert to fraction form
    613.99/847 = 377.74/x
  3. Step 3: Cross multiply
    613.99x = 847 × 377.74
  4. Step 4: Simplify right side
    613.99x = 319,945.78
  5. Step 5: Solve for x
    x = 319,945.78/613.99
  6. Step 6: Final answer
    x = 521.09

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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.