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Finding the Fourth Proportional to 577,633.20, 866,449.80 and 388,676.40

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Solution

The fourth proportional to 577,633.20, 866,449.80 and 388,676.40 is: 583,014.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,633.20 : 866,449.80 = 388,676.40 : x
  2. Step 2: Convert to fraction form
    577,633.20/866,449.80 = 388,676.40/x
  3. Step 3: Cross multiply
    577,633.20x = 866,449.80 × 388,676.40
  4. Step 4: Simplify right side
    577,633.20x = 336,768,589,044.72
  5. Step 5: Solve for x
    x = 336,768,589,044.72/577,633.20
  6. Step 6: Final answer
    x = 583,014.60

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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.