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Finding the Fourth Proportional to 299,966.40, 449,957.70 and 131,400

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Solution

The fourth proportional to 299,966.40, 449,957.70 and 131,400 is: 197,103.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,966.40 : 449,957.70 = 131,400 : x
  2. Step 2: Convert to fraction form
    299,966.40/449,957.70 = 131,400/x
  3. Step 3: Cross multiply
    299,966.40x = 449,957.70 × 131,400
  4. Step 4: Simplify right side
    299,966.40x = 59,124,441,780
  5. Step 5: Solve for x
    x = 59,124,441,780/299,966.40
  6. Step 6: Final answer
    x = 197,103.55

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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.