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Finding the Fourth Proportional to 289,197.28, 399,087.60 and 161,872.48

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Solution

The fourth proportional to 289,197.28, 399,087.60 and 161,872.48 is: 223,381.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,197.28 : 399,087.60 = 161,872.48 : x
  2. Step 2: Convert to fraction form
    289,197.28/399,087.60 = 161,872.48/x
  3. Step 3: Cross multiply
    289,197.28x = 399,087.60 × 161,872.48
  4. Step 4: Simplify right side
    289,197.28x = 64,601,299,549.25
  5. Step 5: Solve for x
    x = 64,601,299,549.25/289,197.28
  6. Step 6: Final answer
    x = 223,381.42

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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.