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Finding the Fourth Proportional to 485,702.65, 728,112.92 and 169,987.33

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Solution

The fourth proportional to 485,702.65, 728,112.92 and 169,987.33 is: 254,826.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,702.65 : 728,112.92 = 169,987.33 : x
  2. Step 2: Convert to fraction form
    485,702.65/728,112.92 = 169,987.33/x
  3. Step 3: Cross multiply
    485,702.65x = 728,112.92 × 169,987.33
  4. Step 4: Simplify right side
    485,702.65x = 123,769,969,813.99
  5. Step 5: Solve for x
    x = 123,769,969,813.99/485,702.65
  6. Step 6: Final answer
    x = 254,826.63

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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.