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Finding the Fourth Proportional to 907,995.81, 1,361,520.77 and 338,908.87

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Solution

The fourth proportional to 907,995.81, 1,361,520.77 and 338,908.87 is: 508,186.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    907,995.81 : 1,361,520.77 = 338,908.87 : x
  2. Step 2: Convert to fraction form
    907,995.81/1,361,520.77 = 338,908.87/x
  3. Step 3: Cross multiply
    907,995.81x = 1,361,520.77 × 338,908.87
  4. Step 4: Simplify right side
    907,995.81x = 461,431,467,555.95
  5. Step 5: Solve for x
    x = 461,431,467,555.95/907,995.81
  6. Step 6: Final answer
    x = 508,186.78

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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.