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Finding the Fourth Proportional to 628,881.20, 943,321.80 and 439,924.40

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Solution

The fourth proportional to 628,881.20, 943,321.80 and 439,924.40 is: 659,886.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,881.20 : 943,321.80 = 439,924.40 : x
  2. Step 2: Convert to fraction form
    628,881.20/943,321.80 = 439,924.40/x
  3. Step 3: Cross multiply
    628,881.20x = 943,321.80 × 439,924.40
  4. Step 4: Simplify right side
    628,881.20x = 414,990,276,871.92
  5. Step 5: Solve for x
    x = 414,990,276,871.92/628,881.20
  6. Step 6: Final answer
    x = 659,886.60

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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.