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Finding the Fourth Proportional to 388,287.98, 582,431.52 and 122,071.76

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Solution

The fourth proportional to 388,287.98, 582,431.52 and 122,071.76 is: 183,107.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,287.98 : 582,431.52 = 122,071.76 : x
  2. Step 2: Convert to fraction form
    388,287.98/582,431.52 = 122,071.76/x
  3. Step 3: Cross multiply
    388,287.98x = 582,431.52 × 122,071.76
  4. Step 4: Simplify right side
    388,287.98x = 71,098,440,725.88
  5. Step 5: Solve for x
    x = 71,098,440,725.88/388,287.98
  6. Step 6: Final answer
    x = 183,107.50

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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.