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Finding the Fourth Proportional to 647,344.20, 971,016.30 and 247,779.30

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Solution

The fourth proportional to 647,344.20, 971,016.30 and 247,779.30 is: 371,668.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,344.20 : 971,016.30 = 247,779.30 : x
  2. Step 2: Convert to fraction form
    647,344.20/971,016.30 = 247,779.30/x
  3. Step 3: Cross multiply
    647,344.20x = 971,016.30 × 247,779.30
  4. Step 4: Simplify right side
    647,344.20x = 240,597,739,102.59
  5. Step 5: Solve for x
    x = 240,597,739,102.59/647,344.20
  6. Step 6: Final answer
    x = 371,668.95

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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.