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Finding the Fourth Proportional to 392,803.38, 589,463.37 and 215,434.89

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Solution

The fourth proportional to 392,803.38, 589,463.37 and 215,434.89 is: 323,294.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,803.38 : 589,463.37 = 215,434.89 : x
  2. Step 2: Convert to fraction form
    392,803.38/589,463.37 = 215,434.89/x
  3. Step 3: Cross multiply
    392,803.38x = 589,463.37 × 215,434.89
  4. Step 4: Simplify right side
    392,803.38x = 126,990,976,274.98
  5. Step 5: Solve for x
    x = 126,990,976,274.98/392,803.38
  6. Step 6: Final answer
    x = 323,294.00

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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.