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Finding the Fourth Proportional to 643,410.21, 888,012.52 and 357,022.56

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Solution

The fourth proportional to 643,410.21, 888,012.52 and 357,022.56 is: 492,750.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,410.21 : 888,012.52 = 357,022.56 : x
  2. Step 2: Convert to fraction form
    643,410.21/888,012.52 = 357,022.56/x
  3. Step 3: Cross multiply
    643,410.21x = 888,012.52 × 357,022.56
  4. Step 4: Simplify right side
    643,410.21x = 317,040,503,202.45
  5. Step 5: Solve for x
    x = 317,040,503,202.45/643,410.21
  6. Step 6: Final answer
    x = 492,750.19

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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.