Home / 1,245,811.20-1,864,780.20-978,122.40

Finding the Fourth Proportional to 1,245,811.20, 1,864,780.20 and 978,122.40

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Solution

The fourth proportional to 1,245,811.20, 1,864,780.20 and 978,122.40 is: 1,464,092.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,811.20 : 1,864,780.20 = 978,122.40 : x
  2. Step 2: Convert to fraction form
    1,245,811.20/1,864,780.20 = 978,122.40/x
  3. Step 3: Cross multiply
    1,245,811.20x = 1,864,780.20 × 978,122.40
  4. Step 4: Simplify right side
    1,245,811.20x = 1,823,983,284,696.48
  5. Step 5: Solve for x
    x = 1,823,983,284,696.48/1,245,811.20
  6. Step 6: Final answer
    x = 1,464,092.86

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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.