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Finding the Fourth Proportional to 2,972,782.40, 4,458,914.40 and 978,238.40

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Solution

The fourth proportional to 2,972,782.40, 4,458,914.40 and 978,238.40 is: 1,467,272.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,972,782.40 : 4,458,914.40 = 978,238.40 : x
  2. Step 2: Convert to fraction form
    2,972,782.40/4,458,914.40 = 978,238.40/x
  3. Step 3: Cross multiply
    2,972,782.40x = 4,458,914.40 × 978,238.40
  4. Step 4: Simplify right side
    2,972,782.40x = 4,361,881,288,392.96
  5. Step 5: Solve for x
    x = 4,361,881,288,392.96/2,972,782.40
  6. Step 6: Final answer
    x = 1,467,272.31

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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.