Home / 1,245,410,002.60-1,868,115,003.90-787,378,719.40

Finding the Fourth Proportional to 1,245,410,002.60, 1,868,115,003.90 and 787,378,719.40

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Solution

The fourth proportional to 1,245,410,002.60, 1,868,115,003.90 and 787,378,719.40 is: 1,181,068,079.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,410,002.60 : 1,868,115,003.90 = 787,378,719.40 : x
  2. Step 2: Convert to fraction form
    1,245,410,002.60/1,868,115,003.90 = 787,378,719.40/x
  3. Step 3: Cross multiply
    1,245,410,002.60x = 1,868,115,003.90 × 787,378,719.40
  4. Step 4: Simplify right side
    1,245,410,002.60x = 1,470,913,999,462,707,968
  5. Step 5: Solve for x
    x = 1,470,913,999,462,707,968/1,245,410,002.60
  6. Step 6: Final answer
    x = 1,181,068,079.10

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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.