Home / 919,135.89-1,268,389.32-511,228.97

Finding the Fourth Proportional to 919,135.89, 1,268,389.32 and 511,228.97

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Solution

The fourth proportional to 919,135.89, 1,268,389.32 and 511,228.97 is: 705,485.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,135.89 : 1,268,389.32 = 511,228.97 : x
  2. Step 2: Convert to fraction form
    919,135.89/1,268,389.32 = 511,228.97/x
  3. Step 3: Cross multiply
    919,135.89x = 1,268,389.32 × 511,228.97
  4. Step 4: Simplify right side
    919,135.89x = 648,437,359,280.65
  5. Step 5: Solve for x
    x = 648,437,359,280.65/919,135.89
  6. Step 6: Final answer
    x = 705,485.84

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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.