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Finding the Fourth Proportional to 443.23, 611.42 and 354.65

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Solution

The fourth proportional to 443.23, 611.42 and 354.65 is: 489.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.23 : 611.42 = 354.65 : x
  2. Step 2: Convert to fraction form
    443.23/611.42 = 354.65/x
  3. Step 3: Cross multiply
    443.23x = 611.42 × 354.65
  4. Step 4: Simplify right side
    443.23x = 216,835.27
  5. Step 5: Solve for x
    x = 216,835.27/443.23
  6. Step 6: Final answer
    x = 489.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.