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Finding the Fourth Proportional to 685,324.80, 945,727.92 and 379,414.80

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Solution

The fourth proportional to 685,324.80, 945,727.92 and 379,414.80 is: 523,581.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,324.80 : 945,727.92 = 379,414.80 : x
  2. Step 2: Convert to fraction form
    685,324.80/945,727.92 = 379,414.80/x
  3. Step 3: Cross multiply
    685,324.80x = 945,727.92 × 379,414.80
  4. Step 4: Simplify right side
    685,324.80x = 358,823,169,621.22
  5. Step 5: Solve for x
    x = 358,823,169,621.22/685,324.80
  6. Step 6: Final answer
    x = 523,581.18

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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.