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Finding the Fourth Proportional to 399,151.55, 598,991.75 and 219,362.53

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Solution

The fourth proportional to 399,151.55, 598,991.75 and 219,362.53 is: 329,189.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,151.55 : 598,991.75 = 219,362.53 : x
  2. Step 2: Convert to fraction form
    399,151.55/598,991.75 = 219,362.53/x
  3. Step 3: Cross multiply
    399,151.55x = 598,991.75 × 219,362.53
  4. Step 4: Simplify right side
    399,151.55x = 131,396,344,780.05
  5. Step 5: Solve for x
    x = 131,396,344,780.05/399,151.55
  6. Step 6: Final answer
    x = 329,189.12

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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.