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Finding the Fourth Proportional to 388,891.40, 582,170.70 and 231,038.60

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Solution

The fourth proportional to 388,891.40, 582,170.70 and 231,038.60 is: 345,864.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,891.40 : 582,170.70 = 231,038.60 : x
  2. Step 2: Convert to fraction form
    388,891.40/582,170.70 = 231,038.60/x
  3. Step 3: Cross multiply
    388,891.40x = 582,170.70 × 231,038.60
  4. Step 4: Simplify right side
    388,891.40x = 134,503,903,489.02
  5. Step 5: Solve for x
    x = 134,503,903,489.02/388,891.40
  6. Step 6: Final answer
    x = 345,864.95

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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.