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Finding the Fourth Proportional to 509,884.60, 764,802.60 and 172,892.20

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Solution

The fourth proportional to 509,884.60, 764,802.60 and 172,892.20 is: 259,330.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,884.60 : 764,802.60 = 172,892.20 : x
  2. Step 2: Convert to fraction form
    509,884.60/764,802.60 = 172,892.20/x
  3. Step 3: Cross multiply
    509,884.60x = 764,802.60 × 172,892.20
  4. Step 4: Simplify right side
    509,884.60x = 132,228,404,079.72
  5. Step 5: Solve for x
    x = 132,228,404,079.72/509,884.60
  6. Step 6: Final answer
    x = 259,330.06

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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.