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Finding the Fourth Proportional to 3,295.78, 4,942.22 and 986.74

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Solution

The fourth proportional to 3,295.78, 4,942.22 and 986.74 is: 1,479.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,295.78 : 4,942.22 = 986.74 : x
  2. Step 2: Convert to fraction form
    3,295.78/4,942.22 = 986.74/x
  3. Step 3: Cross multiply
    3,295.78x = 4,942.22 × 986.74
  4. Step 4: Simplify right side
    3,295.78x = 4,876,661.45
  5. Step 5: Solve for x
    x = 4,876,661.45/3,295.78
  6. Step 6: Final answer
    x = 1,479.67

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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.