Home / 1,188,139.32-1,639,719-678,830.76

Finding the Fourth Proportional to 1,188,139.32, 1,639,719 and 678,830.76

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Solution

The fourth proportional to 1,188,139.32, 1,639,719 and 678,830.76 is: 936,836.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,139.32 : 1,639,719 = 678,830.76 : x
  2. Step 2: Convert to fraction form
    1,188,139.32/1,639,719 = 678,830.76/x
  3. Step 3: Cross multiply
    1,188,139.32x = 1,639,719 × 678,830.76
  4. Step 4: Simplify right side
    1,188,139.32x = 1,113,091,694,956.44
  5. Step 5: Solve for x
    x = 1,113,091,694,956.44/1,188,139.32
  6. Step 6: Final answer
    x = 936,836.01

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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.