Home / 678,375.36-936,048.96-391,933.44

Finding the Fourth Proportional to 678,375.36, 936,048.96 and 391,933.44

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Solution

The fourth proportional to 678,375.36, 936,048.96 and 391,933.44 is: 540,805.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,375.36 : 936,048.96 = 391,933.44 : x
  2. Step 2: Convert to fraction form
    678,375.36/936,048.96 = 391,933.44/x
  3. Step 3: Cross multiply
    678,375.36x = 936,048.96 × 391,933.44
  4. Step 4: Simplify right side
    678,375.36x = 366,868,888,901.22
  5. Step 5: Solve for x
    x = 366,868,888,901.22/678,375.36
  6. Step 6: Final answer
    x = 540,805.15

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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.