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Finding the Fourth Proportional to 439.71, 607.31 and 292.09

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Solution

The fourth proportional to 439.71, 607.31 and 292.09 is: 403.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.71 : 607.31 = 292.09 : x
  2. Step 2: Convert to fraction form
    439.71/607.31 = 292.09/x
  3. Step 3: Cross multiply
    439.71x = 607.31 × 292.09
  4. Step 4: Simplify right side
    439.71x = 177,389.18
  5. Step 5: Solve for x
    x = 177,389.18/439.71
  6. Step 6: Final answer
    x = 403.42

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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.