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Finding the Fourth Proportional to 361,990.45, 499,619.51 and 209,053.54

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Solution

The fourth proportional to 361,990.45, 499,619.51 and 209,053.54 is: 288,535.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,990.45 : 499,619.51 = 209,053.54 : x
  2. Step 2: Convert to fraction form
    361,990.45/499,619.51 = 209,053.54/x
  3. Step 3: Cross multiply
    361,990.45x = 499,619.51 × 209,053.54
  4. Step 4: Simplify right side
    361,990.45x = 104,447,227,218.57
  5. Step 5: Solve for x
    x = 104,447,227,218.57/361,990.45
  6. Step 6: Final answer
    x = 288,535.86

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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.