Home / 685,142.50-1,027,811.76-211,864.36

Finding the Fourth Proportional to 685,142.50, 1,027,811.76 and 211,864.36

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Solution

The fourth proportional to 685,142.50, 1,027,811.76 and 211,864.36 is: 317,826.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,142.50 : 1,027,811.76 = 211,864.36 : x
  2. Step 2: Convert to fraction form
    685,142.50/1,027,811.76 = 211,864.36/x
  3. Step 3: Cross multiply
    685,142.50x = 1,027,811.76 × 211,864.36
  4. Step 4: Simplify right side
    685,142.50x = 217,756,680,732.87
  5. Step 5: Solve for x
    x = 217,756,680,732.87/685,142.50
  6. Step 6: Final answer
    x = 317,826.85

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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.