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Finding the Fourth Proportional to 395,541.79, 545,808.57 and 221,079.33

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Solution

The fourth proportional to 395,541.79, 545,808.57 and 221,079.33 is: 305,067.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,541.79 : 545,808.57 = 221,079.33 : x
  2. Step 2: Convert to fraction form
    395,541.79/545,808.57 = 221,079.33/x
  3. Step 3: Cross multiply
    395,541.79x = 545,808.57 × 221,079.33
  4. Step 4: Simplify right side
    395,541.79x = 120,666,992,963.86
  5. Step 5: Solve for x
    x = 120,666,992,963.86/395,541.79
  6. Step 6: Final answer
    x = 305,067.62

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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.