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Finding the Fourth Proportional to 393,912.32, 543,618.56 and 215,063.04

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Solution

The fourth proportional to 393,912.32, 543,618.56 and 215,063.04 is: 296,797.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,912.32 : 543,618.56 = 215,063.04 : x
  2. Step 2: Convert to fraction form
    393,912.32/543,618.56 = 215,063.04/x
  3. Step 3: Cross multiply
    393,912.32x = 543,618.56 × 215,063.04
  4. Step 4: Simplify right side
    393,912.32x = 116,912,260,114.02
  5. Step 5: Solve for x
    x = 116,912,260,114.02/393,912.32
  6. Step 6: Final answer
    x = 296,797.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.