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Finding the Fourth Proportional to 619,712.20, 929,568.30 and 615,775.60

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Solution

The fourth proportional to 619,712.20, 929,568.30 and 615,775.60 is: 923,663.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,712.20 : 929,568.30 = 615,775.60 : x
  2. Step 2: Convert to fraction form
    619,712.20/929,568.30 = 615,775.60/x
  3. Step 3: Cross multiply
    619,712.20x = 929,568.30 × 615,775.60
  4. Step 4: Simplify right side
    619,712.20x = 572,405,477,673.48
  5. Step 5: Solve for x
    x = 572,405,477,673.48/619,712.20
  6. Step 6: Final answer
    x = 923,663.40

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Half scale
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Double scale
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Similar ratio
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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.