Home / 685,336.80-1,028,102.40-211,972.80

Finding the Fourth Proportional to 685,336.80, 1,028,102.40 and 211,972.80

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Solution

The fourth proportional to 685,336.80, 1,028,102.40 and 211,972.80 is: 317,989.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,336.80 : 1,028,102.40 = 211,972.80 : x
  2. Step 2: Convert to fraction form
    685,336.80/1,028,102.40 = 211,972.80/x
  3. Step 3: Cross multiply
    685,336.80x = 1,028,102.40 × 211,972.80
  4. Step 4: Simplify right side
    685,336.80x = 217,929,744,414.72
  5. Step 5: Solve for x
    x = 217,929,744,414.72/685,336.80
  6. Step 6: Final answer
    x = 317,989.26

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1.5x scale

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.