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Finding the Fourth Proportional to 485,958,343.57, 728,969,838.54 and 170,786,254.39

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Solution

The fourth proportional to 485,958,343.57, 728,969,838.54 and 170,786,254.39 is: 256,190,741.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,958,343.57 : 728,969,838.54 = 170,786,254.39 : x
  2. Step 2: Convert to fraction form
    485,958,343.57/728,969,838.54 = 170,786,254.39/x
  3. Step 3: Cross multiply
    485,958,343.57x = 728,969,838.54 × 170,786,254.39
  4. Step 4: Simplify right side
    485,958,343.57x = 124,498,028,287,529,648
  5. Step 5: Solve for x
    x = 124,498,028,287,529,648/485,958,343.57
  6. Step 6: Final answer
    x = 256,190,741.32

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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.