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Finding the Fourth Proportional to 393,960.96, 543,665.28 and 215,112.96

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Solution

The fourth proportional to 393,960.96, 543,665.28 and 215,112.96 is: 296,855.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,960.96 : 543,665.28 = 215,112.96 : x
  2. Step 2: Convert to fraction form
    393,960.96/543,665.28 = 215,112.96/x
  3. Step 3: Cross multiply
    393,960.96x = 543,665.28 × 215,112.96
  4. Step 4: Simplify right side
    393,960.96x = 116,949,447,630.03
  5. Step 5: Solve for x
    x = 116,949,447,630.03/393,960.96
  6. Step 6: Final answer
    x = 296,855.42

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1.5x scale

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.