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Finding the Fourth Proportional to 289,622.26, 399,259.93 and 203,318.45

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Solution

The fourth proportional to 289,622.26, 399,259.93 and 203,318.45 is: 280,285.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,622.26 : 399,259.93 = 203,318.45 : x
  2. Step 2: Convert to fraction form
    289,622.26/399,259.93 = 203,318.45/x
  3. Step 3: Cross multiply
    289,622.26x = 399,259.93 × 203,318.45
  4. Step 4: Simplify right side
    289,622.26x = 81,176,910,604.56
  5. Step 5: Solve for x
    x = 81,176,910,604.56/289,622.26
  6. Step 6: Final answer
    x = 280,285.47

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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.