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Finding the Fourth Proportional to 485,811.73, 728,811 and 186,268.95

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Solution

The fourth proportional to 485,811.73, 728,811 and 186,268.95 is: 279,439.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,811.73 : 728,811 = 186,268.95 : x
  2. Step 2: Convert to fraction form
    485,811.73/728,811 = 186,268.95/x
  3. Step 3: Cross multiply
    485,811.73x = 728,811 × 186,268.95
  4. Step 4: Simplify right side
    485,811.73x = 135,754,859,718.45
  5. Step 5: Solve for x
    x = 135,754,859,718.45/485,811.73
  6. Step 6: Final answer
    x = 279,439.24

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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.