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Finding the Fourth Proportional to 251.99, 347.65 and 158.67

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Solution

The fourth proportional to 251.99, 347.65 and 158.67 is: 218.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.99 : 347.65 = 158.67 : x
  2. Step 2: Convert to fraction form
    251.99/347.65 = 158.67/x
  3. Step 3: Cross multiply
    251.99x = 347.65 × 158.67
  4. Step 4: Simplify right side
    251.99x = 55,161.63
  5. Step 5: Solve for x
    x = 55,161.63/251.99
  6. Step 6: Final answer
    x = 218.90

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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.