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Finding the Fourth Proportional to 299.47, 446.12 and 290.40

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Solution

The fourth proportional to 299.47, 446.12 and 290.40 is: 432.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.47 : 446.12 = 290.40 : x
  2. Step 2: Convert to fraction form
    299.47/446.12 = 290.40/x
  3. Step 3: Cross multiply
    299.47x = 446.12 × 290.40
  4. Step 4: Simplify right side
    299.47x = 129,553.25
  5. Step 5: Solve for x
    x = 129,553.25/299.47
  6. Step 6: Final answer
    x = 432.61

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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.