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Finding the Fourth Proportional to 397,492.54, 548,489.88 and 268,711.20

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Solution

The fourth proportional to 397,492.54, 548,489.88 and 268,711.20 is: 370,787.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,492.54 : 548,489.88 = 268,711.20 : x
  2. Step 2: Convert to fraction form
    397,492.54/548,489.88 = 268,711.20/x
  3. Step 3: Cross multiply
    397,492.54x = 548,489.88 × 268,711.20
  4. Step 4: Simplify right side
    397,492.54x = 147,385,373,842.66
  5. Step 5: Solve for x
    x = 147,385,373,842.66/397,492.54
  6. Step 6: Final answer
    x = 370,787.77

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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.