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Finding the Fourth Proportional to 271,628.90, 407,115.30 and 138,440.60

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Solution

The fourth proportional to 271,628.90, 407,115.30 and 138,440.60 is: 207,493.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,628.90 : 407,115.30 = 138,440.60 : x
  2. Step 2: Convert to fraction form
    271,628.90/407,115.30 = 138,440.60/x
  3. Step 3: Cross multiply
    271,628.90x = 407,115.30 × 138,440.60
  4. Step 4: Simplify right side
    271,628.90x = 56,361,286,401.18
  5. Step 5: Solve for x
    x = 56,361,286,401.18/271,628.90
  6. Step 6: Final answer
    x = 207,493.70

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1.5x scale

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.