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Finding the Fourth Proportional to 485,809.85, 728,819.34 and 148,873.78

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Solution

The fourth proportional to 485,809.85, 728,819.34 and 148,873.78 is: 223,342.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,809.85 : 728,819.34 = 148,873.78 : x
  2. Step 2: Convert to fraction form
    485,809.85/728,819.34 = 148,873.78/x
  3. Step 3: Cross multiply
    485,809.85x = 728,819.34 × 148,873.78
  4. Step 4: Simplify right side
    485,809.85x = 108,502,090,435.65
  5. Step 5: Solve for x
    x = 108,502,090,435.65/485,809.85
  6. Step 6: Final answer
    x = 223,342.71

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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.