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Finding the Fourth Proportional to 485,809.81, 670,413.79 and 268,027.66

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Solution

The fourth proportional to 485,809.81, 670,413.79 and 268,027.66 is: 369,876.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,809.81 : 670,413.79 = 268,027.66 : x
  2. Step 2: Convert to fraction form
    485,809.81/670,413.79 = 268,027.66/x
  3. Step 3: Cross multiply
    485,809.81x = 670,413.79 × 268,027.66
  4. Step 4: Simplify right side
    485,809.81x = 179,689,439,784.66
  5. Step 5: Solve for x
    x = 179,689,439,784.66/485,809.81
  6. Step 6: Final answer
    x = 369,876.11

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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.