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Finding the Fourth Proportional to 443.56, 660.11 and 430.60

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Solution

The fourth proportional to 443.56, 660.11 and 430.60 is: 640.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.56 : 660.11 = 430.60 : x
  2. Step 2: Convert to fraction form
    443.56/660.11 = 430.60/x
  3. Step 3: Cross multiply
    443.56x = 660.11 × 430.60
  4. Step 4: Simplify right side
    443.56x = 284,243.37
  5. Step 5: Solve for x
    x = 284,243.37/443.56
  6. Step 6: Final answer
    x = 640.82

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.