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Finding the Fourth Proportional to 253.98, 381.57 and 162.85

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Solution

The fourth proportional to 253.98, 381.57 and 162.85 is: 244.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.98 : 381.57 = 162.85 : x
  2. Step 2: Convert to fraction form
    253.98/381.57 = 162.85/x
  3. Step 3: Cross multiply
    253.98x = 381.57 × 162.85
  4. Step 4: Simplify right side
    253.98x = 62,139.46
  5. Step 5: Solve for x
    x = 62,139.46/253.98
  6. Step 6: Final answer
    x = 244.67

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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.