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Finding the Fourth Proportional to 787.95, 1,182.80 and 326.05

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Solution

The fourth proportional to 787.95, 1,182.80 and 326.05 is: 489.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.95 : 1,182.80 = 326.05 : x
  2. Step 2: Convert to fraction form
    787.95/1,182.80 = 326.05/x
  3. Step 3: Cross multiply
    787.95x = 1,182.80 × 326.05
  4. Step 4: Simplify right side
    787.95x = 385,649.80
  5. Step 5: Solve for x
    x = 385,649.80/787.95
  6. Step 6: Final answer
    x = 489.43

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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.