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Finding the Fourth Proportional to 324.30, 448.05 and 299.70

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Solution

The fourth proportional to 324.30, 448.05 and 299.70 is: 414.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.30 : 448.05 = 299.70 : x
  2. Step 2: Convert to fraction form
    324.30/448.05 = 299.70/x
  3. Step 3: Cross multiply
    324.30x = 448.05 × 299.70
  4. Step 4: Simplify right side
    324.30x = 134,280.02
  5. Step 5: Solve for x
    x = 134,280.02/324.30
  6. Step 6: Final answer
    x = 414.06

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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.