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Finding the Fourth Proportional to 852.85, 1,279.21 and 236.58

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Solution

The fourth proportional to 852.85, 1,279.21 and 236.58 is: 354.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    852.85 : 1,279.21 = 236.58 : x
  2. Step 2: Convert to fraction form
    852.85/1,279.21 = 236.58/x
  3. Step 3: Cross multiply
    852.85x = 1,279.21 × 236.58
  4. Step 4: Simplify right side
    852.85x = 302,635.50
  5. Step 5: Solve for x
    x = 302,635.50/852.85
  6. Step 6: Final answer
    x = 354.85

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1.5x scale

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.