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Finding the Fourth Proportional to 388,978.20, 582,545.70 and 263,640.60

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Solution

The fourth proportional to 388,978.20, 582,545.70 and 263,640.60 is: 394,836.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,978.20 : 582,545.70 = 263,640.60 : x
  2. Step 2: Convert to fraction form
    388,978.20/582,545.70 = 263,640.60/x
  3. Step 3: Cross multiply
    388,978.20x = 582,545.70 × 263,640.60
  4. Step 4: Simplify right side
    388,978.20x = 153,582,697,875.42
  5. Step 5: Solve for x
    x = 153,582,697,875.42/388,978.20
  6. Step 6: Final answer
    x = 394,836.26

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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.