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Finding the Fourth Proportional to 392,074.56, 587,999.52 and 214,660.80

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Solution

The fourth proportional to 392,074.56, 587,999.52 and 214,660.80 is: 321,929.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,074.56 : 587,999.52 = 214,660.80 : x
  2. Step 2: Convert to fraction form
    392,074.56/587,999.52 = 214,660.80/x
  3. Step 3: Cross multiply
    392,074.56x = 587,999.52 × 214,660.80
  4. Step 4: Simplify right side
    392,074.56x = 126,220,447,362.82
  5. Step 5: Solve for x
    x = 126,220,447,362.82/392,074.56
  6. Step 6: Final answer
    x = 321,929.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.