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Finding the Fourth Proportional to 621,421.60, 929,799.60 and 411,469.60

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Solution

The fourth proportional to 621,421.60, 929,799.60 and 411,469.60 is: 615,659.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,421.60 : 929,799.60 = 411,469.60 : x
  2. Step 2: Convert to fraction form
    621,421.60/929,799.60 = 411,469.60/x
  3. Step 3: Cross multiply
    621,421.60x = 929,799.60 × 411,469.60
  4. Step 4: Simplify right side
    621,421.60x = 382,584,269,492.16
  5. Step 5: Solve for x
    x = 382,584,269,492.16/621,421.60
  6. Step 6: Final answer
    x = 615,659.75

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Double scale
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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.