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Finding the Fourth Proportional to 618,518.26, 853,555.32 and 376,800.76

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Solution

The fourth proportional to 618,518.26, 853,555.32 and 376,800.76 is: 519,985.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,518.26 : 853,555.32 = 376,800.76 : x
  2. Step 2: Convert to fraction form
    618,518.26/853,555.32 = 376,800.76/x
  3. Step 3: Cross multiply
    618,518.26x = 853,555.32 × 376,800.76
  4. Step 4: Simplify right side
    618,518.26x = 321,620,293,278.04
  5. Step 5: Solve for x
    x = 321,620,293,278.04/618,518.26
  6. Step 6: Final answer
    x = 519,985.12

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Half scale
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Double scale
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Similar ratio
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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.