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Finding the Fourth Proportional to 561,618.77, 774,926.39 and 319,896.05

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Solution

The fourth proportional to 561,618.77, 774,926.39 and 319,896.05 is: 441,395.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,618.77 : 774,926.39 = 319,896.05 : x
  2. Step 2: Convert to fraction form
    561,618.77/774,926.39 = 319,896.05/x
  3. Step 3: Cross multiply
    561,618.77x = 774,926.39 × 319,896.05
  4. Step 4: Simplify right side
    561,618.77x = 247,895,888,126.87
  5. Step 5: Solve for x
    x = 247,895,888,126.87/561,618.77
  6. Step 6: Final answer
    x = 441,395.31

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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.