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Finding the Fourth Proportional to 619.98, 855.66 and 371.46

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Solution

The fourth proportional to 619.98, 855.66 and 371.46 is: 512.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.98 : 855.66 = 371.46 : x
  2. Step 2: Convert to fraction form
    619.98/855.66 = 371.46/x
  3. Step 3: Cross multiply
    619.98x = 855.66 × 371.46
  4. Step 4: Simplify right side
    619.98x = 317,843.46
  5. Step 5: Solve for x
    x = 317,843.46/619.98
  6. Step 6: Final answer
    x = 512.67

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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.