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Finding the Fourth Proportional to 433.10, 649.06 and 278.94

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Solution

The fourth proportional to 433.10, 649.06 and 278.94 is: 418.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.10 : 649.06 = 278.94 : x
  2. Step 2: Convert to fraction form
    433.10/649.06 = 278.94/x
  3. Step 3: Cross multiply
    433.10x = 649.06 × 278.94
  4. Step 4: Simplify right side
    433.10x = 181,048.80
  5. Step 5: Solve for x
    x = 181,048.80/433.10
  6. Step 6: Final answer
    x = 418.03

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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.