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Finding the Fourth Proportional to 285.23, 427.62 and 188.34

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Solution

The fourth proportional to 285.23, 427.62 and 188.34 is: 282.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.23 : 427.62 = 188.34 : x
  2. Step 2: Convert to fraction form
    285.23/427.62 = 188.34/x
  3. Step 3: Cross multiply
    285.23x = 427.62 × 188.34
  4. Step 4: Simplify right side
    285.23x = 80,537.95
  5. Step 5: Solve for x
    x = 80,537.95/285.23
  6. Step 6: Final answer
    x = 282.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.