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Finding the Fourth Proportional to 513,141.80, 768,837.90 and 423,912.20

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Solution

The fourth proportional to 513,141.80, 768,837.90 and 423,912.20 is: 635,145.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,141.80 : 768,837.90 = 423,912.20 : x
  2. Step 2: Convert to fraction form
    513,141.80/768,837.90 = 423,912.20/x
  3. Step 3: Cross multiply
    513,141.80x = 768,837.90 × 423,912.20
  4. Step 4: Simplify right side
    513,141.80x = 325,919,765,632.38
  5. Step 5: Solve for x
    x = 325,919,765,632.38/513,141.80
  6. Step 6: Final answer
    x = 635,145.62

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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.