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Finding the Fourth Proportional to 685,391.45, 945,809.33 and 379,446.35

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Solution

The fourth proportional to 685,391.45, 945,809.33 and 379,446.35 is: 523,618.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,391.45 : 945,809.33 = 379,446.35 : x
  2. Step 2: Convert to fraction form
    685,391.45/945,809.33 = 379,446.35/x
  3. Step 3: Cross multiply
    685,391.45x = 945,809.33 × 379,446.35
  4. Step 4: Simplify right side
    685,391.45x = 358,883,891,438.17
  5. Step 5: Solve for x
    x = 358,883,891,438.17/685,391.45
  6. Step 6: Final answer
    x = 523,618.87

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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.