Home / 392,769.24-589,412.20-215,400.81

Finding the Fourth Proportional to 392,769.24, 589,412.20 and 215,400.81

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Solution

The fourth proportional to 392,769.24, 589,412.20 and 215,400.81 is: 323,242.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,769.24 : 589,412.20 = 215,400.81 : x
  2. Step 2: Convert to fraction form
    392,769.24/589,412.20 = 215,400.81/x
  3. Step 3: Cross multiply
    392,769.24x = 589,412.20 × 215,400.81
  4. Step 4: Simplify right side
    392,769.24x = 126,959,865,303.88
  5. Step 5: Solve for x
    x = 126,959,865,303.88/392,769.24
  6. Step 6: Final answer
    x = 323,242.89

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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.