Home / 685,426.71-945,918.42-379,503.09

Finding the Fourth Proportional to 685,426.71, 945,918.42 and 379,503.09

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Solution

The fourth proportional to 685,426.71, 945,918.42 and 379,503.09 is: 523,730.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,426.71 : 945,918.42 = 379,503.09 : x
  2. Step 2: Convert to fraction form
    685,426.71/945,918.42 = 379,503.09/x
  3. Step 3: Cross multiply
    685,426.71x = 945,918.42 × 379,503.09
  4. Step 4: Simplify right side
    685,426.71x = 358,978,963,277.92
  5. Step 5: Solve for x
    x = 358,978,963,277.92/685,426.71
  6. Step 6: Final answer
    x = 523,730.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.