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Finding the Fourth Proportional to 3,494.66, 5,245.29 and 1,275.65

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Solution

The fourth proportional to 3,494.66, 5,245.29 and 1,275.65 is: 1,914.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,494.66 : 5,245.29 = 1,275.65 : x
  2. Step 2: Convert to fraction form
    3,494.66/5,245.29 = 1,275.65/x
  3. Step 3: Cross multiply
    3,494.66x = 5,245.29 × 1,275.65
  4. Step 4: Simplify right side
    3,494.66x = 6,691,127.96
  5. Step 5: Solve for x
    x = 6,691,127.96/3,494.66
  6. Step 6: Final answer
    x = 1,914.67

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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.