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Finding the Fourth Proportional to 324.99, 485.12 and 286.07

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Solution

The fourth proportional to 324.99, 485.12 and 286.07 is: 427.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.99 : 485.12 = 286.07 : x
  2. Step 2: Convert to fraction form
    324.99/485.12 = 286.07/x
  3. Step 3: Cross multiply
    324.99x = 485.12 × 286.07
  4. Step 4: Simplify right side
    324.99x = 138,778.28
  5. Step 5: Solve for x
    x = 138,778.28/324.99
  6. Step 6: Final answer
    x = 427.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.