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Finding the Fourth Proportional to 536,643.40, 804,965.10 and 287,811.40

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Solution

The fourth proportional to 536,643.40, 804,965.10 and 287,811.40 is: 431,717.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    536,643.40 : 804,965.10 = 287,811.40 : x
  2. Step 2: Convert to fraction form
    536,643.40/804,965.10 = 287,811.40/x
  3. Step 3: Cross multiply
    536,643.40x = 804,965.10 × 287,811.40
  4. Step 4: Simplify right side
    536,643.40x = 231,678,132,382.14
  5. Step 5: Solve for x
    x = 231,678,132,382.14/536,643.40
  6. Step 6: Final answer
    x = 431,717.10

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.