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Finding the Fourth Proportional to 285.21, 427.48 and 130.93

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Solution

The fourth proportional to 285.21, 427.48 and 130.93 is: 196.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.21 : 427.48 = 130.93 : x
  2. Step 2: Convert to fraction form
    285.21/427.48 = 130.93/x
  3. Step 3: Cross multiply
    285.21x = 427.48 × 130.93
  4. Step 4: Simplify right side
    285.21x = 55,968.56
  5. Step 5: Solve for x
    x = 55,968.56/285.21
  6. Step 6: Final answer
    x = 196.23

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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.