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Finding the Fourth Proportional to 388,357,036.80, 582,143,644.80 and 193,969,478.40

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Solution

The fourth proportional to 388,357,036.80, 582,143,644.80 and 193,969,478.40 is: 290,758,473.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,357,036.80 : 582,143,644.80 = 193,969,478.40 : x
  2. Step 2: Convert to fraction form
    388,357,036.80/582,143,644.80 = 193,969,478.40/x
  3. Step 3: Cross multiply
    388,357,036.80x = 582,143,644.80 × 193,969,478.40
  4. Step 4: Simplify right side
    388,357,036.80x = 112,918,099,135,730,864
  5. Step 5: Solve for x
    x = 112,918,099,135,730,864/388,357,036.80
  6. Step 6: Final answer
    x = 290,758,473.35

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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.