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Finding the Fourth Proportional to 392,221.92, 540,608.40 and 300,309.60

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Solution

The fourth proportional to 392,221.92, 540,608.40 and 300,309.60 is: 413,923.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,221.92 : 540,608.40 = 300,309.60 : x
  2. Step 2: Convert to fraction form
    392,221.92/540,608.40 = 300,309.60/x
  3. Step 3: Cross multiply
    392,221.92x = 540,608.40 × 300,309.60
  4. Step 4: Simplify right side
    392,221.92x = 162,349,892,360.64
  5. Step 5: Solve for x
    x = 162,349,892,360.64/392,221.92
  6. Step 6: Final answer
    x = 413,923.56

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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.