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Finding the Fourth Proportional to 443.15, 611.39 and 325.35

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Solution

The fourth proportional to 443.15, 611.39 and 325.35 is: 448.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.15 : 611.39 = 325.35 : x
  2. Step 2: Convert to fraction form
    443.15/611.39 = 325.35/x
  3. Step 3: Cross multiply
    443.15x = 611.39 × 325.35
  4. Step 4: Simplify right side
    443.15x = 198,914.11
  5. Step 5: Solve for x
    x = 198,914.11/443.15
  6. Step 6: Final answer
    x = 448.87

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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.