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Finding the Fourth Proportional to 605.32, 906.09 and 389.05

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Solution

The fourth proportional to 605.32, 906.09 and 389.05 is: 582.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.32 : 906.09 = 389.05 : x
  2. Step 2: Convert to fraction form
    605.32/906.09 = 389.05/x
  3. Step 3: Cross multiply
    605.32x = 906.09 × 389.05
  4. Step 4: Simplify right side
    605.32x = 352,514.31
  5. Step 5: Solve for x
    x = 352,514.31/605.32
  6. Step 6: Final answer
    x = 582.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.