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Finding the Fourth Proportional to 665,018.80, 997,657.80 and 285,938.80

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Solution

The fourth proportional to 665,018.80, 997,657.80 and 285,938.80 is: 428,963.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,018.80 : 997,657.80 = 285,938.80 : x
  2. Step 2: Convert to fraction form
    665,018.80/997,657.80 = 285,938.80/x
  3. Step 3: Cross multiply
    665,018.80x = 997,657.80 × 285,938.80
  4. Step 4: Simplify right side
    665,018.80x = 285,269,074,142.64
  5. Step 5: Solve for x
    x = 285,269,074,142.64/665,018.80
  6. Step 6: Final answer
    x = 428,963.92

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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.