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Finding the Fourth Proportional to 266,431,159.80, 399,079,869.30 and 221,081,527.80

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Solution

The fourth proportional to 266,431,159.80, 399,079,869.30 and 221,081,527.80 is: 331,151,909.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,431,159.80 : 399,079,869.30 = 221,081,527.80 : x
  2. Step 2: Convert to fraction form
    266,431,159.80/399,079,869.30 = 221,081,527.80/x
  3. Step 3: Cross multiply
    266,431,159.80x = 399,079,869.30 × 221,081,527.80
  4. Step 4: Simplify right side
    266,431,159.80x = 88,229,187,219,068,320
  5. Step 5: Solve for x
    x = 88,229,187,219,068,320/266,431,159.80
  6. Step 6: Final answer
    x = 331,151,909.13

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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.