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Finding the Fourth Proportional to 643,954.56, 888,639.84 and 357,467.28

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Solution

The fourth proportional to 643,954.56, 888,639.84 and 357,467.28 is: 493,295.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,954.56 : 888,639.84 = 357,467.28 : x
  2. Step 2: Convert to fraction form
    643,954.56/888,639.84 = 357,467.28/x
  3. Step 3: Cross multiply
    643,954.56x = 888,639.84 × 357,467.28
  4. Step 4: Simplify right side
    643,954.56x = 317,659,666,504.44
  5. Step 5: Solve for x
    x = 317,659,666,504.44/643,954.56
  6. Step 6: Final answer
    x = 493,295.16

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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.