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Finding the Fourth Proportional to 272,646.60, 408,921.30 and 172,627.80

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Solution

The fourth proportional to 272,646.60, 408,921.30 and 172,627.80 is: 258,910.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,646.60 : 408,921.30 = 172,627.80 : x
  2. Step 2: Convert to fraction form
    272,646.60/408,921.30 = 172,627.80/x
  3. Step 3: Cross multiply
    272,646.60x = 408,921.30 × 172,627.80
  4. Step 4: Simplify right side
    272,646.60x = 70,591,184,392.14
  5. Step 5: Solve for x
    x = 70,591,184,392.14/272,646.60
  6. Step 6: Final answer
    x = 258,910.93

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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.