Home / 1,245,784.80-1,870,750.80-685,221.60

Finding the Fourth Proportional to 1,245,784.80, 1,870,750.80 and 685,221.60

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Solution

The fourth proportional to 1,245,784.80, 1,870,750.80 and 685,221.60 is: 1,028,972.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,784.80 : 1,870,750.80 = 685,221.60 : x
  2. Step 2: Convert to fraction form
    1,245,784.80/1,870,750.80 = 685,221.60/x
  3. Step 3: Cross multiply
    1,245,784.80x = 1,870,750.80 × 685,221.60
  4. Step 4: Simplify right side
    1,245,784.80x = 1,281,878,856,377.28
  5. Step 5: Solve for x
    x = 1,281,878,856,377.28/1,245,784.80
  6. Step 6: Final answer
    x = 1,028,972.95

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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.