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Finding the Fourth Proportional to 433.06, 649.06 and 318

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Solution

The fourth proportional to 433.06, 649.06 and 318 is: 476.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.06 : 649.06 = 318 : x
  2. Step 2: Convert to fraction form
    433.06/649.06 = 318/x
  3. Step 3: Cross multiply
    433.06x = 649.06 × 318
  4. Step 4: Simplify right side
    433.06x = 206,401.08
  5. Step 5: Solve for x
    x = 206,401.08/433.06
  6. Step 6: Final answer
    x = 476.61

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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.