Home / 685,276.40-1,028,060.40-212,009.60

Finding the Fourth Proportional to 685,276.40, 1,028,060.40 and 212,009.60

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Solution

The fourth proportional to 685,276.40, 1,028,060.40 and 212,009.60 is: 318,059.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,276.40 : 1,028,060.40 = 212,009.60 : x
  2. Step 2: Convert to fraction form
    685,276.40/1,028,060.40 = 212,009.60/x
  3. Step 3: Cross multiply
    685,276.40x = 1,028,060.40 × 212,009.60
  4. Step 4: Simplify right side
    685,276.40x = 217,958,674,179.84
  5. Step 5: Solve for x
    x = 217,958,674,179.84/685,276.40
  6. Step 6: Final answer
    x = 318,059.51

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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.