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Finding the Fourth Proportional to 511.71, 705.72 and 324.99

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Solution

The fourth proportional to 511.71, 705.72 and 324.99 is: 448.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.71 : 705.72 = 324.99 : x
  2. Step 2: Convert to fraction form
    511.71/705.72 = 324.99/x
  3. Step 3: Cross multiply
    511.71x = 705.72 × 324.99
  4. Step 4: Simplify right side
    511.71x = 229,351.94
  5. Step 5: Solve for x
    x = 229,351.94/511.71
  6. Step 6: Final answer
    x = 448.21

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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.