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Finding the Fourth Proportional to 327,672.90, 491,509.35 and 127,999.80

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Solution

The fourth proportional to 327,672.90, 491,509.35 and 127,999.80 is: 191,999.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,672.90 : 491,509.35 = 127,999.80 : x
  2. Step 2: Convert to fraction form
    327,672.90/491,509.35 = 127,999.80/x
  3. Step 3: Cross multiply
    327,672.90x = 491,509.35 × 127,999.80
  4. Step 4: Simplify right side
    327,672.90x = 62,913,098,498.13
  5. Step 5: Solve for x
    x = 62,913,098,498.13/327,672.90
  6. Step 6: Final answer
    x = 191,999.70

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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.