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Finding the Fourth Proportional to 381.03, 525.79 and 212.98

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Solution

The fourth proportional to 381.03, 525.79 and 212.98 is: 293.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.03 : 525.79 = 212.98 : x
  2. Step 2: Convert to fraction form
    381.03/525.79 = 212.98/x
  3. Step 3: Cross multiply
    381.03x = 525.79 × 212.98
  4. Step 4: Simplify right side
    381.03x = 111,980.02
  5. Step 5: Solve for x
    x = 111,980.02/381.03
  6. Step 6: Final answer
    x = 293.89

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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.