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Finding the Fourth Proportional to 388,398.57, 582,629.45 and 107,915.82

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Solution

The fourth proportional to 388,398.57, 582,629.45 and 107,915.82 is: 161,882.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,398.57 : 582,629.45 = 107,915.82 : x
  2. Step 2: Convert to fraction form
    388,398.57/582,629.45 = 107,915.82/x
  3. Step 3: Cross multiply
    388,398.57x = 582,629.45 × 107,915.82
  4. Step 4: Simplify right side
    388,398.57x = 62,874,934,313.32
  5. Step 5: Solve for x
    x = 62,874,934,313.32/388,398.57
  6. Step 6: Final answer
    x = 161,882.51

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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.