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Finding the Fourth Proportional to 647,941.70, 971,912.55 and 411,454.10

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Solution

The fourth proportional to 647,941.70, 971,912.55 and 411,454.10 is: 617,181.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,941.70 : 971,912.55 = 411,454.10 : x
  2. Step 2: Convert to fraction form
    647,941.70/971,912.55 = 411,454.10/x
  3. Step 3: Cross multiply
    647,941.70x = 971,912.55 × 411,454.10
  4. Step 4: Simplify right side
    647,941.70x = 399,897,403,538.96
  5. Step 5: Solve for x
    x = 399,897,403,538.96/647,941.70
  6. Step 6: Final answer
    x = 617,181.15

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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.