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Finding the Fourth Proportional to 509.33, 763.30 and 447.36

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Solution

The fourth proportional to 509.33, 763.30 and 447.36 is: 670.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.33 : 763.30 = 447.36 : x
  2. Step 2: Convert to fraction form
    509.33/763.30 = 447.36/x
  3. Step 3: Cross multiply
    509.33x = 763.30 × 447.36
  4. Step 4: Simplify right side
    509.33x = 341,469.89
  5. Step 5: Solve for x
    x = 341,469.89/509.33
  6. Step 6: Final answer
    x = 670.43

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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.