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Finding the Fourth Proportional to 289,622.88, 399,679.20 and 162,299.34

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Solution

The fourth proportional to 289,622.88, 399,679.20 and 162,299.34 is: 223,972.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,622.88 : 399,679.20 = 162,299.34 : x
  2. Step 2: Convert to fraction form
    289,622.88/399,679.20 = 162,299.34/x
  3. Step 3: Cross multiply
    289,622.88x = 399,679.20 × 162,299.34
  4. Step 4: Simplify right side
    289,622.88x = 64,867,670,371.73
  5. Step 5: Solve for x
    x = 64,867,670,371.73/289,622.88
  6. Step 6: Final answer
    x = 223,972.88

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1.5x scale

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.