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Finding the Fourth Proportional to 433.84, 649.70 and 279.30

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Solution

The fourth proportional to 433.84, 649.70 and 279.30 is: 418.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.84 : 649.70 = 279.30 : x
  2. Step 2: Convert to fraction form
    433.84/649.70 = 279.30/x
  3. Step 3: Cross multiply
    433.84x = 649.70 × 279.30
  4. Step 4: Simplify right side
    433.84x = 181,461.21
  5. Step 5: Solve for x
    x = 181,461.21/433.84
  6. Step 6: Final answer
    x = 418.27

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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.