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Finding the Fourth Proportional to 619.18, 854.04 and 422.36

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Solution

The fourth proportional to 619.18, 854.04 and 422.36 is: 582.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.18 : 854.04 = 422.36 : x
  2. Step 2: Convert to fraction form
    619.18/854.04 = 422.36/x
  3. Step 3: Cross multiply
    619.18x = 854.04 × 422.36
  4. Step 4: Simplify right side
    619.18x = 360,712.33
  5. Step 5: Solve for x
    x = 360,712.33/619.18
  6. Step 6: Final answer
    x = 582.56

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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.