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Finding the Fourth Proportional to 618,357.19, 853,139.22 and 346,388.35

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Solution

The fourth proportional to 618,357.19, 853,139.22 and 346,388.35 is: 477,907.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,357.19 : 853,139.22 = 346,388.35 : x
  2. Step 2: Convert to fraction form
    618,357.19/853,139.22 = 346,388.35/x
  3. Step 3: Cross multiply
    618,357.19x = 853,139.22 × 346,388.35
  4. Step 4: Simplify right side
    618,357.19x = 295,517,486,736.09
  5. Step 5: Solve for x
    x = 295,517,486,736.09/618,357.19
  6. Step 6: Final answer
    x = 477,907.42

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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.