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Finding the Fourth Proportional to 492,003.79, 678,978.35 and 277,131.04

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Solution

The fourth proportional to 492,003.79, 678,978.35 and 277,131.04 is: 382,448.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,003.79 : 678,978.35 = 277,131.04 : x
  2. Step 2: Convert to fraction form
    492,003.79/678,978.35 = 277,131.04/x
  3. Step 3: Cross multiply
    492,003.79x = 678,978.35 × 277,131.04
  4. Step 4: Simplify right side
    492,003.79x = 188,165,974,229.12
  5. Step 5: Solve for x
    x = 188,165,974,229.12/492,003.79
  6. Step 6: Final answer
    x = 382,448.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.