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Finding the Fourth Proportional to 289,232.55, 399,136.55 and 161,912.70

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Solution

The fourth proportional to 289,232.55, 399,136.55 and 161,912.70 is: 223,437.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,232.55 : 399,136.55 = 161,912.70 : x
  2. Step 2: Convert to fraction form
    289,232.55/399,136.55 = 161,912.70/x
  3. Step 3: Cross multiply
    289,232.55x = 399,136.55 × 161,912.70
  4. Step 4: Simplify right side
    289,232.55x = 64,625,275,669.62
  5. Step 5: Solve for x
    x = 64,625,275,669.62/289,232.55
  6. Step 6: Final answer
    x = 223,437.08

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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.