Home / 685,422.20-1,028,171.58-212,070.66

Finding the Fourth Proportional to 685,422.20, 1,028,171.58 and 212,070.66

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Solution

The fourth proportional to 685,422.20, 1,028,171.58 and 212,070.66 is: 318,117.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,422.20 : 1,028,171.58 = 212,070.66 : x
  2. Step 2: Convert to fraction form
    685,422.20/1,028,171.58 = 212,070.66/x
  3. Step 3: Cross multiply
    685,422.20x = 1,028,171.58 × 212,070.66
  4. Step 4: Simplify right side
    685,422.20x = 218,045,020,912.93
  5. Step 5: Solve for x
    x = 218,045,020,912.93/685,422.20
  6. Step 6: Final answer
    x = 318,117.83

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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.