Home / 1,245,783.80-1,870,749.30-685,220.60

Finding the Fourth Proportional to 1,245,783.80, 1,870,749.30 and 685,220.60

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Solution

The fourth proportional to 1,245,783.80, 1,870,749.30 and 685,220.60 is: 1,028,971.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,783.80 : 1,870,749.30 = 685,220.60 : x
  2. Step 2: Convert to fraction form
    1,245,783.80/1,870,749.30 = 685,220.60/x
  3. Step 3: Cross multiply
    1,245,783.80x = 1,870,749.30 × 685,220.60
  4. Step 4: Simplify right side
    1,245,783.80x = 1,281,875,957,795.58
  5. Step 5: Solve for x
    x = 1,281,875,957,795.58/1,245,783.80
  6. Step 6: Final answer
    x = 1,028,971.45

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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.