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Finding the Fourth Proportional to 289,365.20, 434,047.80 and 177,390.80

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Solution

The fourth proportional to 289,365.20, 434,047.80 and 177,390.80 is: 266,086.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,365.20 : 434,047.80 = 177,390.80 : x
  2. Step 2: Convert to fraction form
    289,365.20/434,047.80 = 177,390.80/x
  3. Step 3: Cross multiply
    289,365.20x = 434,047.80 × 177,390.80
  4. Step 4: Simplify right side
    289,365.20x = 76,996,086,480.24
  5. Step 5: Solve for x
    x = 76,996,086,480.24/289,365.20
  6. Step 6: Final answer
    x = 266,086.20

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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.