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Finding the Fourth Proportional to 433.24, 650.75 and 421.70

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Solution

The fourth proportional to 433.24, 650.75 and 421.70 is: 633.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.24 : 650.75 = 421.70 : x
  2. Step 2: Convert to fraction form
    433.24/650.75 = 421.70/x
  3. Step 3: Cross multiply
    433.24x = 650.75 × 421.70
  4. Step 4: Simplify right side
    433.24x = 274,419.71
  5. Step 5: Solve for x
    x = 274,419.71/433.24
  6. Step 6: Final answer
    x = 633.41

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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.