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Finding the Fourth Proportional to 388,946.30, 582,435.30 and 371,231.60

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Solution

The fourth proportional to 388,946.30, 582,435.30 and 371,231.60 is: 555,908.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,946.30 : 582,435.30 = 371,231.60 : x
  2. Step 2: Convert to fraction form
    388,946.30/582,435.30 = 371,231.60/x
  3. Step 3: Cross multiply
    388,946.30x = 582,435.30 × 371,231.60
  4. Step 4: Simplify right side
    388,946.30x = 216,218,388,315.48
  5. Step 5: Solve for x
    x = 216,218,388,315.48/388,946.30
  6. Step 6: Final answer
    x = 555,908.07

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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.