Home / 394,435.32-591,278.46-128,009.51

Finding the Fourth Proportional to 394,435.32, 591,278.46 and 128,009.51

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Solution

The fourth proportional to 394,435.32, 591,278.46 and 128,009.51 is: 191,892.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,435.32 : 591,278.46 = 128,009.51 : x
  2. Step 2: Convert to fraction form
    394,435.32/591,278.46 = 128,009.51/x
  3. Step 3: Cross multiply
    394,435.32x = 591,278.46 × 128,009.51
  4. Step 4: Simplify right side
    394,435.32x = 75,689,268,404.99
  5. Step 5: Solve for x
    x = 75,689,268,404.99/394,435.32
  6. Step 6: Final answer
    x = 191,892.72

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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.