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Finding the Fourth Proportional to 289,921.80, 434,882.70 and 140,233.80

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Solution

The fourth proportional to 289,921.80, 434,882.70 and 140,233.80 is: 210,350.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,921.80 : 434,882.70 = 140,233.80 : x
  2. Step 2: Convert to fraction form
    289,921.80/434,882.70 = 140,233.80/x
  3. Step 3: Cross multiply
    289,921.80x = 434,882.70 × 140,233.80
  4. Step 4: Simplify right side
    289,921.80x = 60,985,253,575.26
  5. Step 5: Solve for x
    x = 60,985,253,575.26/289,921.80
  6. Step 6: Final answer
    x = 210,350.70

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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.