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Finding the Fourth Proportional to 326,727.60, 490,091.40 and 271,431.60

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Solution

The fourth proportional to 326,727.60, 490,091.40 and 271,431.60 is: 407,147.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,727.60 : 490,091.40 = 271,431.60 : x
  2. Step 2: Convert to fraction form
    326,727.60/490,091.40 = 271,431.60/x
  3. Step 3: Cross multiply
    326,727.60x = 490,091.40 × 271,431.60
  4. Step 4: Simplify right side
    326,727.60x = 133,026,292,848.24
  5. Step 5: Solve for x
    x = 133,026,292,848.24/326,727.60
  6. Step 6: Final answer
    x = 407,147.40

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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.