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Finding the Fourth Proportional to 536,643.90, 804,965.85 and 287,811.90

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Solution

The fourth proportional to 536,643.90, 804,965.85 and 287,811.90 is: 431,717.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    536,643.90 : 804,965.85 = 287,811.90 : x
  2. Step 2: Convert to fraction form
    536,643.90/804,965.85 = 287,811.90/x
  3. Step 3: Cross multiply
    536,643.90x = 804,965.85 × 287,811.90
  4. Step 4: Simplify right side
    536,643.90x = 231,678,750,723.62
  5. Step 5: Solve for x
    x = 231,678,750,723.62/536,643.90
  6. Step 6: Final answer
    x = 431,717.85

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.