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Finding the Fourth Proportional to 443.18, 611.55 and 266.20

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Solution

The fourth proportional to 443.18, 611.55 and 266.20 is: 367.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.18 : 611.55 = 266.20 : x
  2. Step 2: Convert to fraction form
    443.18/611.55 = 266.20/x
  3. Step 3: Cross multiply
    443.18x = 611.55 × 266.20
  4. Step 4: Simplify right side
    443.18x = 162,793.08
  5. Step 5: Solve for x
    x = 162,793.08/443.18
  6. Step 6: Final answer
    x = 367.33

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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.