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Finding the Fourth Proportional to 433.94, 651.30 and 217.64

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Solution

The fourth proportional to 433.94, 651.30 and 217.64 is: 326.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.94 : 651.30 = 217.64 : x
  2. Step 2: Convert to fraction form
    433.94/651.30 = 217.64/x
  3. Step 3: Cross multiply
    433.94x = 651.30 × 217.64
  4. Step 4: Simplify right side
    433.94x = 141,748.93
  5. Step 5: Solve for x
    x = 141,748.93/433.94
  6. Step 6: Final answer
    x = 326.66

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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.