Home / 678,936.12-936,961.52-377,130.12

Finding the Fourth Proportional to 678,936.12, 936,961.52 and 377,130.12

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Solution

The fourth proportional to 678,936.12, 936,961.52 and 377,130.12 is: 520,456.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,936.12 : 936,961.52 = 377,130.12 : x
  2. Step 2: Convert to fraction form
    678,936.12/936,961.52 = 377,130.12/x
  3. Step 3: Cross multiply
    678,936.12x = 936,961.52 × 377,130.12
  4. Step 4: Simplify right side
    678,936.12x = 353,356,410,472.98
  5. Step 5: Solve for x
    x = 353,356,410,472.98/678,936.12
  6. Step 6: Final answer
    x = 520,456.05

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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.