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Finding the Fourth Proportional to 619.88, 854.98 and 371.11

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Solution

The fourth proportional to 619.88, 854.98 and 371.11 is: 511.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.88 : 854.98 = 371.11 : x
  2. Step 2: Convert to fraction form
    619.88/854.98 = 371.11/x
  3. Step 3: Cross multiply
    619.88x = 854.98 × 371.11
  4. Step 4: Simplify right side
    619.88x = 317,288.80
  5. Step 5: Solve for x
    x = 317,288.80/619.88
  6. Step 6: Final answer
    x = 511.86

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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.