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Finding the Fourth Proportional to 485,879.04, 670,543.11 and 268,086.65

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Solution

The fourth proportional to 485,879.04, 670,543.11 and 268,086.65 is: 369,976.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,879.04 : 670,543.11 = 268,086.65 : x
  2. Step 2: Convert to fraction form
    485,879.04/670,543.11 = 268,086.65/x
  3. Step 3: Cross multiply
    485,879.04x = 670,543.11 × 268,086.65
  4. Step 4: Simplify right side
    485,879.04x = 179,763,656,040.48
  5. Step 5: Solve for x
    x = 179,763,656,040.48/485,879.04
  6. Step 6: Final answer
    x = 369,976.15

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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.