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Finding the Fourth Proportional to 1,211.58, 1,818.41 and 481.67

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Solution

The fourth proportional to 1,211.58, 1,818.41 and 481.67 is: 722.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.58 : 1,818.41 = 481.67 : x
  2. Step 2: Convert to fraction form
    1,211.58/1,818.41 = 481.67/x
  3. Step 3: Cross multiply
    1,211.58x = 1,818.41 × 481.67
  4. Step 4: Simplify right side
    1,211.58x = 875,868.86
  5. Step 5: Solve for x
    x = 875,868.86/1,211.58
  6. Step 6: Final answer
    x = 722.91

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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.