Home / 499,939.92-689,947.56-285,121.44

Finding the Fourth Proportional to 499,939.92, 689,947.56 and 285,121.44

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Solution

The fourth proportional to 499,939.92, 689,947.56 and 285,121.44 is: 393,484.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,939.92 : 689,947.56 = 285,121.44 : x
  2. Step 2: Convert to fraction form
    499,939.92/689,947.56 = 285,121.44/x
  3. Step 3: Cross multiply
    499,939.92x = 689,947.56 × 285,121.44
  4. Step 4: Simplify right side
    499,939.92x = 196,718,841,831.69
  5. Step 5: Solve for x
    x = 196,718,841,831.69/499,939.92
  6. Step 6: Final answer
    x = 393,484.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.