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Finding the Fourth Proportional to 511.91, 706.31 and 302.09

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Solution

The fourth proportional to 511.91, 706.31 and 302.09 is: 416.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.91 : 706.31 = 302.09 : x
  2. Step 2: Convert to fraction form
    511.91/706.31 = 302.09/x
  3. Step 3: Cross multiply
    511.91x = 706.31 × 302.09
  4. Step 4: Simplify right side
    511.91x = 213,371.71
  5. Step 5: Solve for x
    x = 213,371.71/511.91
  6. Step 6: Final answer
    x = 416.81

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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.