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Finding the Fourth Proportional to 790,998.88, 1,091,571.84 and 428,414.32

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Solution

The fourth proportional to 790,998.88, 1,091,571.84 and 428,414.32 is: 591,208.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    790,998.88 : 1,091,571.84 = 428,414.32 : x
  2. Step 2: Convert to fraction form
    790,998.88/1,091,571.84 = 428,414.32/x
  3. Step 3: Cross multiply
    790,998.88x = 1,091,571.84 × 428,414.32
  4. Step 4: Simplify right side
    790,998.88x = 467,645,007,564.75
  5. Step 5: Solve for x
    x = 467,645,007,564.75/790,998.88
  6. Step 6: Final answer
    x = 591,208.18

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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.