Home / 685,636.40-1,028,579.40-236,421.68

Finding the Fourth Proportional to 685,636.40, 1,028,579.40 and 236,421.68

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Solution

The fourth proportional to 685,636.40, 1,028,579.40 and 236,421.68 is: 354,675.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,636.40 : 1,028,579.40 = 236,421.68 : x
  2. Step 2: Convert to fraction form
    685,636.40/1,028,579.40 = 236,421.68/x
  3. Step 3: Cross multiply
    685,636.40x = 1,028,579.40 × 236,421.68
  4. Step 4: Simplify right side
    685,636.40x = 243,178,469,761.39
  5. Step 5: Solve for x
    x = 243,178,469,761.39/685,636.40
  6. Step 6: Final answer
    x = 354,675.55

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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.