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Finding the Fourth Proportional to 354.99, 531.41 and 300.45

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Solution

The fourth proportional to 354.99, 531.41 and 300.45 is: 449.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.99 : 531.41 = 300.45 : x
  2. Step 2: Convert to fraction form
    354.99/531.41 = 300.45/x
  3. Step 3: Cross multiply
    354.99x = 531.41 × 300.45
  4. Step 4: Simplify right side
    354.99x = 159,660.63
  5. Step 5: Solve for x
    x = 159,660.63/354.99
  6. Step 6: Final answer
    x = 449.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.