Home / 1,214,338.40-1,821,507.60-978,142.40

Finding the Fourth Proportional to 1,214,338.40, 1,821,507.60 and 978,142.40

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Solution

The fourth proportional to 1,214,338.40, 1,821,507.60 and 978,142.40 is: 1,467,213.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214,338.40 : 1,821,507.60 = 978,142.40 : x
  2. Step 2: Convert to fraction form
    1,214,338.40/1,821,507.60 = 978,142.40/x
  3. Step 3: Cross multiply
    1,214,338.40x = 1,821,507.60 × 978,142.40
  4. Step 4: Simplify right side
    1,214,338.40x = 1,781,693,815,482.24
  5. Step 5: Solve for x
    x = 1,781,693,815,482.24/1,214,338.40
  6. Step 6: Final answer
    x = 1,467,213.60

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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.