Home / 1,245,803.80-1,870,779.30-685,240.60

Finding the Fourth Proportional to 1,245,803.80, 1,870,779.30 and 685,240.60

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Solution

The fourth proportional to 1,245,803.80, 1,870,779.30 and 685,240.60 is: 1,029,001.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,803.80 : 1,870,779.30 = 685,240.60 : x
  2. Step 2: Convert to fraction form
    1,245,803.80/1,870,779.30 = 685,240.60/x
  3. Step 3: Cross multiply
    1,245,803.80x = 1,870,779.30 × 685,240.60
  4. Step 4: Simplify right side
    1,245,803.80x = 1,281,933,929,999.58
  5. Step 5: Solve for x
    x = 1,281,933,929,999.58/1,245,803.80
  6. Step 6: Final answer
    x = 1,029,001.46

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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.