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Finding the Fourth Proportional to 3,459.67, 5,190.26 and 994.30

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Solution

The fourth proportional to 3,459.67, 5,190.26 and 994.30 is: 1,491.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,459.67 : 5,190.26 = 994.30 : x
  2. Step 2: Convert to fraction form
    3,459.67/5,190.26 = 994.30/x
  3. Step 3: Cross multiply
    3,459.67x = 5,190.26 × 994.30
  4. Step 4: Simplify right side
    3,459.67x = 5,160,675.52
  5. Step 5: Solve for x
    x = 5,160,675.52/3,459.67
  6. Step 6: Final answer
    x = 1,491.67

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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.