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Finding the Fourth Proportional to 678,880.70, 936,855.73 and 372,976.77

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Solution

The fourth proportional to 678,880.70, 936,855.73 and 372,976.77 is: 514,708.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,880.70 : 936,855.73 = 372,976.77 : x
  2. Step 2: Convert to fraction form
    678,880.70/936,855.73 = 372,976.77/x
  3. Step 3: Cross multiply
    678,880.70x = 936,855.73 × 372,976.77
  4. Step 4: Simplify right side
    678,880.70x = 349,425,422,981.48
  5. Step 5: Solve for x
    x = 349,425,422,981.48/678,880.70
  6. Step 6: Final answer
    x = 514,708.14

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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.