Home / 257,787.97-386,653.30-80,280.11

Finding the Fourth Proportional to 257,787.97, 386,653.30 and 80,280.11

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Solution

The fourth proportional to 257,787.97, 386,653.30 and 80,280.11 is: 120,411.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,787.97 : 386,653.30 = 80,280.11 : x
  2. Step 2: Convert to fraction form
    257,787.97/386,653.30 = 80,280.11/x
  3. Step 3: Cross multiply
    257,787.97x = 386,653.30 × 80,280.11
  4. Step 4: Simplify right side
    257,787.97x = 31,040,570,221.80
  5. Step 5: Solve for x
    x = 31,040,570,221.80/257,787.97
  6. Step 6: Final answer
    x = 120,411.25

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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.