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Finding the Fourth Proportional to 485,810.20, 728,585.70 and 170,234.20

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Solution

The fourth proportional to 485,810.20, 728,585.70 and 170,234.20 is: 255,305.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,810.20 : 728,585.70 = 170,234.20 : x
  2. Step 2: Convert to fraction form
    485,810.20/728,585.70 = 170,234.20/x
  3. Step 3: Cross multiply
    485,810.20x = 728,585.70 × 170,234.20
  4. Step 4: Simplify right side
    485,810.20x = 124,030,203,770.94
  5. Step 5: Solve for x
    x = 124,030,203,770.94/485,810.20
  6. Step 6: Final answer
    x = 255,305.89

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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.