Home / 678,376.36-936,050.34-391,934.44

Finding the Fourth Proportional to 678,376.36, 936,050.34 and 391,934.44

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Solution

The fourth proportional to 678,376.36, 936,050.34 and 391,934.44 is: 540,806.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,376.36 : 936,050.34 = 391,934.44 : x
  2. Step 2: Convert to fraction form
    678,376.36/936,050.34 = 391,934.44/x
  3. Step 3: Cross multiply
    678,376.36x = 936,050.34 × 391,934.44
  4. Step 4: Simplify right side
    678,376.36x = 366,870,365,819.71
  5. Step 5: Solve for x
    x = 366,870,365,819.71/678,376.36
  6. Step 6: Final answer
    x = 540,806.53

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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.