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Finding the Fourth Proportional to 581,203.20, 871,804.80 and 439,485.60

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Solution

The fourth proportional to 581,203.20, 871,804.80 and 439,485.60 is: 659,228.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    581,203.20 : 871,804.80 = 439,485.60 : x
  2. Step 2: Convert to fraction form
    581,203.20/871,804.80 = 439,485.60/x
  3. Step 3: Cross multiply
    581,203.20x = 871,804.80 × 439,485.60
  4. Step 4: Simplify right side
    581,203.20x = 383,145,655,610.88
  5. Step 5: Solve for x
    x = 383,145,655,610.88/581,203.20
  6. Step 6: Final answer
    x = 659,228.40

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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.