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Finding the Fourth Proportional to 388,512.60, 582,423.30 and 255,456.60

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Solution

The fourth proportional to 388,512.60, 582,423.30 and 255,456.60 is: 382,957.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,512.60 : 582,423.30 = 255,456.60 : x
  2. Step 2: Convert to fraction form
    388,512.60/582,423.30 = 255,456.60/x
  3. Step 3: Cross multiply
    388,512.60x = 582,423.30 × 255,456.60
  4. Step 4: Simplify right side
    388,512.60x = 148,783,875,978.78
  5. Step 5: Solve for x
    x = 148,783,875,978.78/388,512.60
  6. Step 6: Final answer
    x = 382,957.66

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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.