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Finding the Fourth Proportional to 618,518.75, 853,556 and 376,801.25

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Solution

The fourth proportional to 618,518.75, 853,556 and 376,801.25 is: 519,985.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,518.75 : 853,556 = 376,801.25 : x
  2. Step 2: Convert to fraction form
    618,518.75/853,556 = 376,801.25/x
  3. Step 3: Cross multiply
    618,518.75x = 853,556 × 376,801.25
  4. Step 4: Simplify right side
    618,518.75x = 321,620,967,745
  5. Step 5: Solve for x
    x = 321,620,967,745/618,518.75
  6. Step 6: Final answer
    x = 519,985.80

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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.