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Finding the Fourth Proportional to 205,728.40, 308,592.60 and 65,501.20

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Solution

The fourth proportional to 205,728.40, 308,592.60 and 65,501.20 is: 98,251.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,728.40 : 308,592.60 = 65,501.20 : x
  2. Step 2: Convert to fraction form
    205,728.40/308,592.60 = 65,501.20/x
  3. Step 3: Cross multiply
    205,728.40x = 308,592.60 × 65,501.20
  4. Step 4: Simplify right side
    205,728.40x = 20,213,185,611.12
  5. Step 5: Solve for x
    x = 20,213,185,611.12/205,728.40
  6. Step 6: Final answer
    x = 98,251.80

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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.