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Finding the Fourth Proportional to 272,318.40, 408,196.80 and 122,630.40

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Solution

The fourth proportional to 272,318.40, 408,196.80 and 122,630.40 is: 183,819.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,318.40 : 408,196.80 = 122,630.40 : x
  2. Step 2: Convert to fraction form
    272,318.40/408,196.80 = 122,630.40/x
  3. Step 3: Cross multiply
    272,318.40x = 408,196.80 × 122,630.40
  4. Step 4: Simplify right side
    272,318.40x = 50,057,336,862.72
  5. Step 5: Solve for x
    x = 50,057,336,862.72/272,318.40
  6. Step 6: Final answer
    x = 183,819.15

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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.