Home / 1,129,141.45-1,558,174.84-639,100.45

Finding the Fourth Proportional to 1,129,141.45, 1,558,174.84 and 639,100.45

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Solution

The fourth proportional to 1,129,141.45, 1,558,174.84 and 639,100.45 is: 881,935.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,129,141.45 : 1,558,174.84 = 639,100.45 : x
  2. Step 2: Convert to fraction form
    1,129,141.45/1,558,174.84 = 639,100.45/x
  3. Step 3: Cross multiply
    1,129,141.45x = 1,558,174.84 × 639,100.45
  4. Step 4: Simplify right side
    1,129,141.45x = 995,830,241,422.68
  5. Step 5: Solve for x
    x = 995,830,241,422.68/1,129,141.45
  6. Step 6: Final answer
    x = 881,935.78

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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.