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Finding the Fourth Proportional to 305,628.80, 458,443.20 and 193,654.40

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Solution

The fourth proportional to 305,628.80, 458,443.20 and 193,654.40 is: 290,481.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,628.80 : 458,443.20 = 193,654.40 : x
  2. Step 2: Convert to fraction form
    305,628.80/458,443.20 = 193,654.40/x
  3. Step 3: Cross multiply
    305,628.80x = 458,443.20 × 193,654.40
  4. Step 4: Simplify right side
    305,628.80x = 88,779,542,830.08
  5. Step 5: Solve for x
    x = 88,779,542,830.08/305,628.80
  6. Step 6: Final answer
    x = 290,481.60

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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.