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Finding the Fourth Proportional to 578,128.44, 797,754.82 and 319,964.36

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Solution

The fourth proportional to 578,128.44, 797,754.82 and 319,964.36 is: 441,516.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,128.44 : 797,754.82 = 319,964.36 : x
  2. Step 2: Convert to fraction form
    578,128.44/797,754.82 = 319,964.36/x
  3. Step 3: Cross multiply
    578,128.44x = 797,754.82 × 319,964.36
  4. Step 4: Simplify right side
    578,128.44x = 255,253,110,418.22
  5. Step 5: Solve for x
    x = 255,253,110,418.22/578,128.44
  6. Step 6: Final answer
    x = 441,516.27

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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.