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Finding the Fourth Proportional to 663,012.60, 994,518.90 and 411,070.20

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Solution

The fourth proportional to 663,012.60, 994,518.90 and 411,070.20 is: 616,605.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,012.60 : 994,518.90 = 411,070.20 : x
  2. Step 2: Convert to fraction form
    663,012.60/994,518.90 = 411,070.20/x
  3. Step 3: Cross multiply
    663,012.60x = 994,518.90 × 411,070.20
  4. Step 4: Simplify right side
    663,012.60x = 408,817,083,126.78
  5. Step 5: Solve for x
    x = 408,817,083,126.78/663,012.60
  6. Step 6: Final answer
    x = 616,605.30

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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.