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Finding the Fourth Proportional to 399,065.98, 550,723.21 and 227,008.88

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Solution

The fourth proportional to 399,065.98, 550,723.21 and 227,008.88 is: 313,279.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,065.98 : 550,723.21 = 227,008.88 : x
  2. Step 2: Convert to fraction form
    399,065.98/550,723.21 = 227,008.88/x
  3. Step 3: Cross multiply
    399,065.98x = 550,723.21 × 227,008.88
  4. Step 4: Simplify right side
    399,065.98x = 125,019,055,203.44
  5. Step 5: Solve for x
    x = 125,019,055,203.44/399,065.98
  6. Step 6: Final answer
    x = 313,279.16

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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.