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Finding the Fourth Proportional to 485,897.20, 728,857.32 and 186,526.96

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Solution

The fourth proportional to 485,897.20, 728,857.32 and 186,526.96 is: 279,794.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,897.20 : 728,857.32 = 186,526.96 : x
  2. Step 2: Convert to fraction form
    485,897.20/728,857.32 = 186,526.96/x
  3. Step 3: Cross multiply
    485,897.20x = 728,857.32 × 186,526.96
  4. Step 4: Simplify right side
    485,897.20x = 135,951,540,173.35
  5. Step 5: Solve for x
    x = 135,951,540,173.35/485,897.20
  6. Step 6: Final answer
    x = 279,794.86

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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.