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Finding the Fourth Proportional to 318,319.60, 439,133.78 and 190,773.76

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Solution

The fourth proportional to 318,319.60, 439,133.78 and 190,773.76 is: 263,179.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,319.60 : 439,133.78 = 190,773.76 : x
  2. Step 2: Convert to fraction form
    318,319.60/439,133.78 = 190,773.76/x
  3. Step 3: Cross multiply
    318,319.60x = 439,133.78 × 190,773.76
  4. Step 4: Simplify right side
    318,319.60x = 83,775,202,353.61
  5. Step 5: Solve for x
    x = 83,775,202,353.61/318,319.60
  6. Step 6: Final answer
    x = 263,179.53

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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.