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Finding the Fourth Proportional to 485,900.97, 728,991.45 and 148,991.26

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Solution

The fourth proportional to 485,900.97, 728,991.45 and 148,991.26 is: 223,529.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,900.97 : 728,991.45 = 148,991.26 : x
  2. Step 2: Convert to fraction form
    485,900.97/728,991.45 = 148,991.26/x
  3. Step 3: Cross multiply
    485,900.97x = 728,991.45 × 148,991.26
  4. Step 4: Simplify right side
    485,900.97x = 108,613,350,274.81
  5. Step 5: Solve for x
    x = 108,613,350,274.81/485,900.97
  6. Step 6: Final answer
    x = 223,529.81

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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.