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Finding the Fourth Proportional to 392,118.43, 541,121.93 and 220,036.01

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Solution

The fourth proportional to 392,118.43, 541,121.93 and 220,036.01 is: 303,648.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,118.43 : 541,121.93 = 220,036.01 : x
  2. Step 2: Convert to fraction form
    392,118.43/541,121.93 = 220,036.01/x
  3. Step 3: Cross multiply
    392,118.43x = 541,121.93 × 220,036.01
  4. Step 4: Simplify right side
    392,118.43x = 119,066,308,490.42
  5. Step 5: Solve for x
    x = 119,066,308,490.42/392,118.43
  6. Step 6: Final answer
    x = 303,648.84

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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.