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Finding the Fourth Proportional to 393,528.43, 543,027.36 and 221,443.39

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Solution

The fourth proportional to 393,528.43, 543,027.36 and 221,443.39 is: 305,568.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,528.43 : 543,027.36 = 221,443.39 : x
  2. Step 2: Convert to fraction form
    393,528.43/543,027.36 = 221,443.39/x
  3. Step 3: Cross multiply
    393,528.43x = 543,027.36 × 221,443.39
  4. Step 4: Simplify right side
    393,528.43x = 120,249,820,970.35
  5. Step 5: Solve for x
    x = 120,249,820,970.35/393,528.43
  6. Step 6: Final answer
    x = 305,568.32

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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.