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Finding the Fourth Proportional to 615,376.20, 923,064.30 and 447,414.60

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Solution

The fourth proportional to 615,376.20, 923,064.30 and 447,414.60 is: 671,121.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,376.20 : 923,064.30 = 447,414.60 : x
  2. Step 2: Convert to fraction form
    615,376.20/923,064.30 = 447,414.60/x
  3. Step 3: Cross multiply
    615,376.20x = 923,064.30 × 447,414.60
  4. Step 4: Simplify right side
    615,376.20x = 412,992,444,558.78
  5. Step 5: Solve for x
    x = 412,992,444,558.78/615,376.20
  6. Step 6: Final answer
    x = 671,121.90

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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.