Home / 1,245,815.20-1,864,786.20-978,126.40

Finding the Fourth Proportional to 1,245,815.20, 1,864,786.20 and 978,126.40

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Solution

The fourth proportional to 1,245,815.20, 1,864,786.20 and 978,126.40 is: 1,464,098.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,815.20 : 1,864,786.20 = 978,126.40 : x
  2. Step 2: Convert to fraction form
    1,245,815.20/1,864,786.20 = 978,126.40/x
  3. Step 3: Cross multiply
    1,245,815.20x = 1,864,786.20 × 978,126.40
  4. Step 4: Simplify right side
    1,245,815.20x = 1,823,996,612,575.68
  5. Step 5: Solve for x
    x = 1,823,996,612,575.68/1,245,815.20
  6. Step 6: Final answer
    x = 1,464,098.86

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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.