Home / 685,972.80-1,028,998.08-212,725.44

Finding the Fourth Proportional to 685,972.80, 1,028,998.08 and 212,725.44

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Solution

The fourth proportional to 685,972.80, 1,028,998.08 and 212,725.44 is: 319,100.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,972.80 : 1,028,998.08 = 212,725.44 : x
  2. Step 2: Convert to fraction form
    685,972.80/1,028,998.08 = 212,725.44/x
  3. Step 3: Cross multiply
    685,972.80x = 1,028,998.08 × 212,725.44
  4. Step 4: Simplify right side
    685,972.80x = 218,894,069,327.16
  5. Step 5: Solve for x
    x = 218,894,069,327.16/685,972.80
  6. Step 6: Final answer
    x = 319,100.22

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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.