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Finding the Fourth Proportional to 289,933.76, 434,725.89 and 129,980.76

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Solution

The fourth proportional to 289,933.76, 434,725.89 and 129,980.76 is: 194,892.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,933.76 : 434,725.89 = 129,980.76 : x
  2. Step 2: Convert to fraction form
    289,933.76/434,725.89 = 129,980.76/x
  3. Step 3: Cross multiply
    289,933.76x = 434,725.89 × 129,980.76
  4. Step 4: Simplify right side
    289,933.76x = 56,505,999,400.25
  5. Step 5: Solve for x
    x = 56,505,999,400.25/289,933.76
  6. Step 6: Final answer
    x = 194,892.79

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1.5x scale

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.