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Finding the Fourth Proportional to 485,576.70, 728,338.19 and 148,617.11

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Solution

The fourth proportional to 485,576.70, 728,338.19 and 148,617.11 is: 222,917.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,576.70 : 728,338.19 = 148,617.11 : x
  2. Step 2: Convert to fraction form
    485,576.70/728,338.19 = 148,617.11/x
  3. Step 3: Cross multiply
    485,576.70x = 728,338.19 × 148,617.11
  4. Step 4: Simplify right side
    485,576.70x = 108,243,512,515.65
  5. Step 5: Solve for x
    x = 108,243,512,515.65/485,576.70
  6. Step 6: Final answer
    x = 222,917.44

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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.