Home / 685,422.21-945,912.20-379,498.58

Finding the Fourth Proportional to 685,422.21, 945,912.20 and 379,498.58

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Solution

The fourth proportional to 685,422.21, 945,912.20 and 379,498.58 is: 523,724.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,422.21 : 945,912.20 = 379,498.58 : x
  2. Step 2: Convert to fraction form
    685,422.21/945,912.20 = 379,498.58/x
  3. Step 3: Cross multiply
    685,422.21x = 945,912.20 × 379,498.58
  4. Step 4: Simplify right side
    685,422.21x = 358,972,333,909.86
  5. Step 5: Solve for x
    x = 358,972,333,909.86/685,422.21
  6. Step 6: Final answer
    x = 523,724.40

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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.