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Finding the Fourth Proportional to 257,265.60, 386,335.80 and 190,780.80

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Solution

The fourth proportional to 257,265.60, 386,335.80 and 190,780.80 is: 286,495.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,265.60 : 386,335.80 = 190,780.80 : x
  2. Step 2: Convert to fraction form
    257,265.60/386,335.80 = 190,780.80/x
  3. Step 3: Cross multiply
    257,265.60x = 386,335.80 × 190,780.80
  4. Step 4: Simplify right side
    257,265.60x = 73,705,452,992.64
  5. Step 5: Solve for x
    x = 73,705,452,992.64/257,265.60
  6. Step 6: Final answer
    x = 286,495.56

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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.