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Finding the Fourth Proportional to 619.98, 854.54 and 440.28

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Solution

The fourth proportional to 619.98, 854.54 and 440.28 is: 606.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.98 : 854.54 = 440.28 : x
  2. Step 2: Convert to fraction form
    619.98/854.54 = 440.28/x
  3. Step 3: Cross multiply
    619.98x = 854.54 × 440.28
  4. Step 4: Simplify right side
    619.98x = 376,234.67
  5. Step 5: Solve for x
    x = 376,234.67/619.98
  6. Step 6: Final answer
    x = 606.85

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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.