Home / 678,764.39-936,724.29-388,467.08

Finding the Fourth Proportional to 678,764.39, 936,724.29 and 388,467.08

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Solution

The fourth proportional to 678,764.39, 936,724.29 and 388,467.08 is: 536,101.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,764.39 : 936,724.29 = 388,467.08 : x
  2. Step 2: Convert to fraction form
    678,764.39/936,724.29 = 388,467.08/x
  3. Step 3: Cross multiply
    678,764.39x = 936,724.29 × 388,467.08
  4. Step 4: Simplify right side
    678,764.39x = 363,886,545,017.75
  5. Step 5: Solve for x
    x = 363,886,545,017.75/678,764.39
  6. Step 6: Final answer
    x = 536,101.41

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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.