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Finding the Fourth Proportional to 418,849.80, 628,637.46 and 219,309.72

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Solution

The fourth proportional to 418,849.80, 628,637.46 and 219,309.72 is: 329,154.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,849.80 : 628,637.46 = 219,309.72 : x
  2. Step 2: Convert to fraction form
    418,849.80/628,637.46 = 219,309.72/x
  3. Step 3: Cross multiply
    418,849.80x = 628,637.46 × 219,309.72
  4. Step 4: Simplify right side
    418,849.80x = 137,866,305,334.11
  5. Step 5: Solve for x
    x = 137,866,305,334.11/418,849.80
  6. Step 6: Final answer
    x = 329,154.52

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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.