Home / 1,245,802.80-1,870,777.80-685,239.60

Finding the Fourth Proportional to 1,245,802.80, 1,870,777.80 and 685,239.60

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Solution

The fourth proportional to 1,245,802.80, 1,870,777.80 and 685,239.60 is: 1,028,999.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,802.80 : 1,870,777.80 = 685,239.60 : x
  2. Step 2: Convert to fraction form
    1,245,802.80/1,870,777.80 = 685,239.60/x
  3. Step 3: Cross multiply
    1,245,802.80x = 1,870,777.80 × 685,239.60
  4. Step 4: Simplify right side
    1,245,802.80x = 1,281,931,031,360.88
  5. Step 5: Solve for x
    x = 1,281,931,031,360.88/1,245,802.80
  6. Step 6: Final answer
    x = 1,028,999.96

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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.