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Finding the Fourth Proportional to 382,804.82, 528,287.98 and 221,666.90

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Solution

The fourth proportional to 382,804.82, 528,287.98 and 221,666.90 is: 305,910.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,804.82 : 528,287.98 = 221,666.90 : x
  2. Step 2: Convert to fraction form
    382,804.82/528,287.98 = 221,666.90/x
  3. Step 3: Cross multiply
    382,804.82x = 528,287.98 × 221,666.90
  4. Step 4: Simplify right side
    382,804.82x = 117,103,958,833.86
  5. Step 5: Solve for x
    x = 117,103,958,833.86/382,804.82
  6. Step 6: Final answer
    x = 305,910.36

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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.