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Finding the Fourth Proportional to 411,194,543.60, 616,791,815.40 and 393,054,690.80

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Solution

The fourth proportional to 411,194,543.60, 616,791,815.40 and 393,054,690.80 is: 589,582,036.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,194,543.60 : 616,791,815.40 = 393,054,690.80 : x
  2. Step 2: Convert to fraction form
    411,194,543.60/616,791,815.40 = 393,054,690.80/x
  3. Step 3: Cross multiply
    411,194,543.60x = 616,791,815.40 × 393,054,690.80
  4. Step 4: Simplify right side
    411,194,543.60x = 242,432,916,290,017,664
  5. Step 5: Solve for x
    x = 242,432,916,290,017,664/411,194,543.60
  6. Step 6: Final answer
    x = 589,582,036.20

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.