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Finding the Fourth Proportional to 354,415.56, 489,105.28 and 193,279.40

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Solution

The fourth proportional to 354,415.56, 489,105.28 and 193,279.40 is: 266,732.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,415.56 : 489,105.28 = 193,279.40 : x
  2. Step 2: Convert to fraction form
    354,415.56/489,105.28 = 193,279.40/x
  3. Step 3: Cross multiply
    354,415.56x = 489,105.28 × 193,279.40
  4. Step 4: Simplify right side
    354,415.56x = 94,533,975,055.23
  5. Step 5: Solve for x
    x = 94,533,975,055.23/354,415.56
  6. Step 6: Final answer
    x = 266,732.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.