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Finding the Fourth Proportional to 521,996.40, 783,140.40 and 255,765.60

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Solution

The fourth proportional to 521,996.40, 783,140.40 and 255,765.60 is: 383,719.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,996.40 : 783,140.40 = 255,765.60 : x
  2. Step 2: Convert to fraction form
    521,996.40/783,140.40 = 255,765.60/x
  3. Step 3: Cross multiply
    521,996.40x = 783,140.40 × 255,765.60
  4. Step 4: Simplify right side
    521,996.40x = 200,300,374,290.24
  5. Step 5: Solve for x
    x = 200,300,374,290.24/521,996.40
  6. Step 6: Final answer
    x = 383,719.84

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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.