Home / 919,135.09-1,268,388.20-511,228.16

Finding the Fourth Proportional to 919,135.09, 1,268,388.20 and 511,228.16

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Solution

The fourth proportional to 919,135.09, 1,268,388.20 and 511,228.16 is: 705,484.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,135.09 : 1,268,388.20 = 511,228.16 : x
  2. Step 2: Convert to fraction form
    919,135.09/1,268,388.20 = 511,228.16/x
  3. Step 3: Cross multiply
    919,135.09x = 1,268,388.20 × 511,228.16
  4. Step 4: Simplify right side
    919,135.09x = 648,435,756,753.63
  5. Step 5: Solve for x
    x = 648,435,756,753.63/919,135.09
  6. Step 6: Final answer
    x = 705,484.71

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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.