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Finding the Fourth Proportional to 327,967.92, 491,638.14 and 128,221.92

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Solution

The fourth proportional to 327,967.92, 491,638.14 and 128,221.92 is: 192,210.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,967.92 : 491,638.14 = 128,221.92 : x
  2. Step 2: Convert to fraction form
    327,967.92/491,638.14 = 128,221.92/x
  3. Step 3: Cross multiply
    327,967.92x = 491,638.14 × 128,221.92
  4. Step 4: Simplify right side
    327,967.92x = 63,038,786,256.03
  5. Step 5: Solve for x
    x = 63,038,786,256.03/327,967.92
  6. Step 6: Final answer
    x = 192,210.22

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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.