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Finding the Fourth Proportional to 604.50, 905.00 and 430.62

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Solution

The fourth proportional to 604.50, 905.00 and 430.62 is: 644.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.50 : 905.00 = 430.62 : x
  2. Step 2: Convert to fraction form
    604.50/905.00 = 430.62/x
  3. Step 3: Cross multiply
    604.50x = 905.00 × 430.62
  4. Step 4: Simplify right side
    604.50x = 389,708.95
  5. Step 5: Solve for x
    x = 389,708.95/604.50
  6. Step 6: Final answer
    x = 644.68

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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.