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Finding the Fourth Proportional to 442.64, 611.08 and 285.37

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Solution

The fourth proportional to 442.64, 611.08 and 285.37 is: 393.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.64 : 611.08 = 285.37 : x
  2. Step 2: Convert to fraction form
    442.64/611.08 = 285.37/x
  3. Step 3: Cross multiply
    442.64x = 611.08 × 285.37
  4. Step 4: Simplify right side
    442.64x = 174,379.42
  5. Step 5: Solve for x
    x = 174,379.42/442.64
  6. Step 6: Final answer
    x = 393.95

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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.