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Finding the Fourth Proportional to 440.50, 663.22 and 389.44

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Solution

The fourth proportional to 440.50, 663.22 and 389.44 is: 586.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.50 : 663.22 = 389.44 : x
  2. Step 2: Convert to fraction form
    440.50/663.22 = 389.44/x
  3. Step 3: Cross multiply
    440.50x = 663.22 × 389.44
  4. Step 4: Simplify right side
    440.50x = 258,284.40
  5. Step 5: Solve for x
    x = 258,284.40/440.50
  6. Step 6: Final answer
    x = 586.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.