Home / 643,725.77-889,078.84-423,945.54

Finding the Fourth Proportional to 643,725.77, 889,078.84 and 423,945.54

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Solution

The fourth proportional to 643,725.77, 889,078.84 and 423,945.54 is: 585,530.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,725.77 : 889,078.84 = 423,945.54 : x
  2. Step 2: Convert to fraction form
    643,725.77/889,078.84 = 423,945.54/x
  3. Step 3: Cross multiply
    643,725.77x = 889,078.84 × 423,945.54
  4. Step 4: Simplify right side
    643,725.77x = 376,921,002,361.25
  5. Step 5: Solve for x
    x = 376,921,002,361.25/643,725.77
  6. Step 6: Final answer
    x = 585,530.39

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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.