Home / 685,711.80-1,028,369.04-205,920.24

Finding the Fourth Proportional to 685,711.80, 1,028,369.04 and 205,920.24

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Solution

The fourth proportional to 685,711.80, 1,028,369.04 and 205,920.24 is: 308,820.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,711.80 : 1,028,369.04 = 205,920.24 : x
  2. Step 2: Convert to fraction form
    685,711.80/1,028,369.04 = 205,920.24/x
  3. Step 3: Cross multiply
    685,711.80x = 1,028,369.04 × 205,920.24
  4. Step 4: Simplify right side
    685,711.80x = 211,761,999,525.37
  5. Step 5: Solve for x
    x = 211,761,999,525.37/685,711.80
  6. Step 6: Final answer
    x = 308,820.70

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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.