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Finding the Fourth Proportional to 418,226.21, 626,986.65 and 181,390.51

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Solution

The fourth proportional to 418,226.21, 626,986.65 and 181,390.51 is: 271,932.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,226.21 : 626,986.65 = 181,390.51 : x
  2. Step 2: Convert to fraction form
    418,226.21/626,986.65 = 181,390.51/x
  3. Step 3: Cross multiply
    418,226.21x = 626,986.65 × 181,390.51
  4. Step 4: Simplify right side
    418,226.21x = 113,729,428,206.69
  5. Step 5: Solve for x
    x = 113,729,428,206.69/418,226.21
  6. Step 6: Final answer
    x = 271,932.81

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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.