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Finding the Fourth Proportional to 433.76, 650.77 and 387.82

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Solution

The fourth proportional to 433.76, 650.77 and 387.82 is: 581.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.76 : 650.77 = 387.82 : x
  2. Step 2: Convert to fraction form
    433.76/650.77 = 387.82/x
  3. Step 3: Cross multiply
    433.76x = 650.77 × 387.82
  4. Step 4: Simplify right side
    433.76x = 252,377.40
  5. Step 5: Solve for x
    x = 252,377.40/433.76
  6. Step 6: Final answer
    x = 581.84

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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.