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Finding the Fourth Proportional to 289,399.70, 434,115.96 and 89,748.47

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Solution

The fourth proportional to 289,399.70, 434,115.96 and 89,748.47 is: 134,627.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,399.70 : 434,115.96 = 89,748.47 : x
  2. Step 2: Convert to fraction form
    289,399.70/434,115.96 = 89,748.47/x
  3. Step 3: Cross multiply
    289,399.70x = 434,115.96 × 89,748.47
  4. Step 4: Simplify right side
    289,399.70x = 38,961,243,212.58
  5. Step 5: Solve for x
    x = 38,961,243,212.58/289,399.70
  6. Step 6: Final answer
    x = 134,627.79

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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.