Home / 685,281.69-1,028,156.05-205,521.12

Finding the Fourth Proportional to 685,281.69, 1,028,156.05 and 205,521.12

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Solution

The fourth proportional to 685,281.69, 1,028,156.05 and 205,521.12 is: 308,351.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,281.69 : 1,028,156.05 = 205,521.12 : x
  2. Step 2: Convert to fraction form
    685,281.69/1,028,156.05 = 205,521.12/x
  3. Step 3: Cross multiply
    685,281.69x = 1,028,156.05 × 205,521.12
  4. Step 4: Simplify right side
    685,281.69x = 211,307,782,930.78
  5. Step 5: Solve for x
    x = 211,307,782,930.78/685,281.69
  6. Step 6: Final answer
    x = 308,351.71

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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.