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Finding the Fourth Proportional to 1,384,608, 2,076,912 and 387,336

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Solution

The fourth proportional to 1,384,608, 2,076,912 and 387,336 is: 581,004

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384,608 : 2,076,912 = 387,336 : x
  2. Step 2: Convert to fraction form
    1,384,608/2,076,912 = 387,336/x
  3. Step 3: Cross multiply
    1,384,608x = 2,076,912 × 387,336
  4. Step 4: Simplify right side
    1,384,608x = 804,462,786,432
  5. Step 5: Solve for x
    x = 804,462,786,432/1,384,608
  6. Step 6: Final answer
    x = 581,004

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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.