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Finding the Fourth Proportional to 272,311.20, 408,466.80 and 172,912.05

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Solution

The fourth proportional to 272,311.20, 408,466.80 and 172,912.05 is: 259,368.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,311.20 : 408,466.80 = 172,912.05 : x
  2. Step 2: Convert to fraction form
    272,311.20/408,466.80 = 172,912.05/x
  3. Step 3: Cross multiply
    272,311.20x = 408,466.80 × 172,912.05
  4. Step 4: Simplify right side
    272,311.20x = 70,628,831,744.94
  5. Step 5: Solve for x
    x = 70,628,831,744.94/272,311.20
  6. Step 6: Final answer
    x = 259,368.08

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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.