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Finding the Fourth Proportional to 538,042.80, 806,869.80 and 218,060.40

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Solution

The fourth proportional to 538,042.80, 806,869.80 and 218,060.40 is: 327,011.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,042.80 : 806,869.80 = 218,060.40 : x
  2. Step 2: Convert to fraction form
    538,042.80/806,869.80 = 218,060.40/x
  3. Step 3: Cross multiply
    538,042.80x = 806,869.80 × 218,060.40
  4. Step 4: Simplify right side
    538,042.80x = 175,946,351,335.92
  5. Step 5: Solve for x
    x = 175,946,351,335.92/538,042.80
  6. Step 6: Final answer
    x = 327,011.81

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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.