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Finding the Fourth Proportional to 1,289,536.40, 1,933,843.80 and 579,904.40

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Solution

The fourth proportional to 1,289,536.40, 1,933,843.80 and 579,904.40 is: 869,649.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,536.40 : 1,933,843.80 = 579,904.40 : x
  2. Step 2: Convert to fraction form
    1,289,536.40/1,933,843.80 = 579,904.40/x
  3. Step 3: Cross multiply
    1,289,536.40x = 1,933,843.80 × 579,904.40
  4. Step 4: Simplify right side
    1,289,536.40x = 1,121,444,528,532.72
  5. Step 5: Solve for x
    x = 1,121,444,528,532.72/1,289,536.40
  6. Step 6: Final answer
    x = 869,649.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.