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Finding the Fourth Proportional to 443.96, 611.02 and 388.84

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Solution

The fourth proportional to 443.96, 611.02 and 388.84 is: 535.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.96 : 611.02 = 388.84 : x
  2. Step 2: Convert to fraction form
    443.96/611.02 = 388.84/x
  3. Step 3: Cross multiply
    443.96x = 611.02 × 388.84
  4. Step 4: Simplify right side
    443.96x = 237,589.02
  5. Step 5: Solve for x
    x = 237,589.02/443.96
  6. Step 6: Final answer
    x = 535.16

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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.