Home / 1,120,687.81-1,680,851.27-321,787.64

Finding the Fourth Proportional to 1,120,687.81, 1,680,851.27 and 321,787.64

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Solution

The fourth proportional to 1,120,687.81, 1,680,851.27 and 321,787.64 is: 482,629.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120,687.81 : 1,680,851.27 = 321,787.64 : x
  2. Step 2: Convert to fraction form
    1,120,687.81/1,680,851.27 = 321,787.64/x
  3. Step 3: Cross multiply
    1,120,687.81x = 1,680,851.27 × 321,787.64
  4. Step 4: Simplify right side
    1,120,687.81x = 540,877,161,755.37
  5. Step 5: Solve for x
    x = 540,877,161,755.37/1,120,687.81
  6. Step 6: Final answer
    x = 482,629.65

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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.