Home / 285,789.66-428,340.64-105,731.52

Finding the Fourth Proportional to 285,789.66, 428,340.64 and 105,731.52

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Solution

The fourth proportional to 285,789.66, 428,340.64 and 105,731.52 is: 158,470.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,789.66 : 428,340.64 = 105,731.52 : x
  2. Step 2: Convert to fraction form
    285,789.66/428,340.64 = 105,731.52/x
  3. Step 3: Cross multiply
    285,789.66x = 428,340.64 × 105,731.52
  4. Step 4: Simplify right side
    285,789.66x = 45,289,106,944.97
  5. Step 5: Solve for x
    x = 45,289,106,944.97/285,789.66
  6. Step 6: Final answer
    x = 158,470.07

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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.