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Finding the Fourth Proportional to 327,809.40, 491,714.10 and 128,136.30

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Solution

The fourth proportional to 327,809.40, 491,714.10 and 128,136.30 is: 192,204.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,809.40 : 491,714.10 = 128,136.30 : x
  2. Step 2: Convert to fraction form
    327,809.40/491,714.10 = 128,136.30/x
  3. Step 3: Cross multiply
    327,809.40x = 491,714.10 × 128,136.30
  4. Step 4: Simplify right side
    327,809.40x = 63,006,425,431.83
  5. Step 5: Solve for x
    x = 63,006,425,431.83/327,809.40
  6. Step 6: Final answer
    x = 192,204.45

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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.