Home / 685,076.48-945,174.88-398,360.80

Finding the Fourth Proportional to 685,076.48, 945,174.88 and 398,360.80

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Solution

The fourth proportional to 685,076.48, 945,174.88 and 398,360.80 is: 549,603.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,076.48 : 945,174.88 = 398,360.80 : x
  2. Step 2: Convert to fraction form
    685,076.48/945,174.88 = 398,360.80/x
  3. Step 3: Cross multiply
    685,076.48x = 945,174.88 × 398,360.80
  4. Step 4: Simplify right side
    685,076.48x = 376,520,621,336.70
  5. Step 5: Solve for x
    x = 376,520,621,336.70/685,076.48
  6. Step 6: Final answer
    x = 549,603.78

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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.