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Finding the Fourth Proportional to 852.67, 1,278.10 and 486.67

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Solution

The fourth proportional to 852.67, 1,278.10 and 486.67 is: 729.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    852.67 : 1,278.10 = 486.67 : x
  2. Step 2: Convert to fraction form
    852.67/1,278.10 = 486.67/x
  3. Step 3: Cross multiply
    852.67x = 1,278.10 × 486.67
  4. Step 4: Simplify right side
    852.67x = 622,012.93
  5. Step 5: Solve for x
    x = 622,012.93/852.67
  6. Step 6: Final answer
    x = 729.49

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Double scale
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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.