Home / 1,188,115.12-1,639,685.76-678,806.56

Finding the Fourth Proportional to 1,188,115.12, 1,639,685.76 and 678,806.56

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Solution

The fourth proportional to 1,188,115.12, 1,639,685.76 and 678,806.56 is: 936,802.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,115.12 : 1,639,685.76 = 678,806.56 : x
  2. Step 2: Convert to fraction form
    1,188,115.12/1,639,685.76 = 678,806.56/x
  3. Step 3: Cross multiply
    1,188,115.12x = 1,639,685.76 × 678,806.56
  4. Step 4: Simplify right side
    1,188,115.12x = 1,113,029,450,226.59
  5. Step 5: Solve for x
    x = 1,113,029,450,226.59/1,188,115.12
  6. Step 6: Final answer
    x = 936,802.70

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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.