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Finding the Fourth Proportional to 485,879.29, 670,543.47 and 268,086.91

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Solution

The fourth proportional to 485,879.29, 670,543.47 and 268,086.91 is: 369,976.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,879.29 : 670,543.47 = 268,086.91 : x
  2. Step 2: Convert to fraction form
    485,879.29/670,543.47 = 268,086.91/x
  3. Step 3: Cross multiply
    485,879.29x = 670,543.47 × 268,086.91
  4. Step 4: Simplify right side
    485,879.29x = 179,763,926,892.98
  5. Step 5: Solve for x
    x = 179,763,926,892.98/485,879.29
  6. Step 6: Final answer
    x = 369,976.52

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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.