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Finding the Fourth Proportional to 388,405.32, 582,639.60 and 107,922.60

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Solution

The fourth proportional to 388,405.32, 582,639.60 and 107,922.60 is: 161,892.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,405.32 : 582,639.60 = 107,922.60 : x
  2. Step 2: Convert to fraction form
    388,405.32/582,639.60 = 107,922.60/x
  3. Step 3: Cross multiply
    388,405.32x = 582,639.60 × 107,922.60
  4. Step 4: Simplify right side
    388,405.32x = 62,879,980,494.96
  5. Step 5: Solve for x
    x = 62,879,980,494.96/388,405.32
  6. Step 6: Final answer
    x = 161,892.69

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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.