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Finding the Fourth Proportional to 388,515.12, 582,813.08 and 148,628.48

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Solution

The fourth proportional to 388,515.12, 582,813.08 and 148,628.48 is: 222,958.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,515.12 : 582,813.08 = 148,628.48 : x
  2. Step 2: Convert to fraction form
    388,515.12/582,813.08 = 148,628.48/x
  3. Step 3: Cross multiply
    388,515.12x = 582,813.08 × 148,628.48
  4. Step 4: Simplify right side
    388,515.12x = 86,622,622,204.52
  5. Step 5: Solve for x
    x = 86,622,622,204.52/388,515.12
  6. Step 6: Final answer
    x = 222,958.18

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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.