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Finding the Fourth Proportional to 818,196, 1,129,109.28 and 455,651.60

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Solution

The fourth proportional to 818,196, 1,129,109.28 and 455,651.60 is: 628,798.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,196 : 1,129,109.28 = 455,651.60 : x
  2. Step 2: Convert to fraction form
    818,196/1,129,109.28 = 455,651.60/x
  3. Step 3: Cross multiply
    818,196x = 1,129,109.28 × 455,651.60
  4. Step 4: Simplify right side
    818,196x = 514,480,450,006.85
  5. Step 5: Solve for x
    x = 514,480,450,006.85/818,196
  6. Step 6: Final answer
    x = 628,798.54

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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.