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Finding the Fourth Proportional to 1,396,891.04, 1,927,658.40 and 853,936.16

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Solution

The fourth proportional to 1,396,891.04, 1,927,658.40 and 853,936.16 is: 1,178,400.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396,891.04 : 1,927,658.40 = 853,936.16 : x
  2. Step 2: Convert to fraction form
    1,396,891.04/1,927,658.40 = 853,936.16/x
  3. Step 3: Cross multiply
    1,396,891.04x = 1,927,658.40 × 853,936.16
  4. Step 4: Simplify right side
    1,396,891.04x = 1,646,097,211,887.74
  5. Step 5: Solve for x
    x = 1,646,097,211,887.74/1,396,891.04
  6. Step 6: Final answer
    x = 1,178,400.58

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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.