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Finding the Fourth Proportional to 354,910.66, 489,774.20 and 193,765.69

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Solution

The fourth proportional to 354,910.66, 489,774.20 and 193,765.69 is: 267,395.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,910.66 : 489,774.20 = 193,765.69 : x
  2. Step 2: Convert to fraction form
    354,910.66/489,774.20 = 193,765.69/x
  3. Step 3: Cross multiply
    354,910.66x = 489,774.20 × 193,765.69
  4. Step 4: Simplify right side
    354,910.66x = 94,901,433,613.93
  5. Step 5: Solve for x
    x = 94,901,433,613.93/354,910.66
  6. Step 6: Final answer
    x = 267,395.28

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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.