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Finding the Fourth Proportional to 433.50, 648.64 and 272.49

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Solution

The fourth proportional to 433.50, 648.64 and 272.49 is: 407.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.50 : 648.64 = 272.49 : x
  2. Step 2: Convert to fraction form
    433.50/648.64 = 272.49/x
  3. Step 3: Cross multiply
    433.50x = 648.64 × 272.49
  4. Step 4: Simplify right side
    433.50x = 176,747.91
  5. Step 5: Solve for x
    x = 176,747.91/433.50
  6. Step 6: Final answer
    x = 407.72

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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.