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Finding the Fourth Proportional to 289,609.80, 434,447.10 and 89,928.60

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Solution

The fourth proportional to 289,609.80, 434,447.10 and 89,928.60 is: 134,902.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,609.80 : 434,447.10 = 89,928.60 : x
  2. Step 2: Convert to fraction form
    289,609.80/434,447.10 = 89,928.60/x
  3. Step 3: Cross multiply
    289,609.80x = 434,447.10 × 89,928.60
  4. Step 4: Simplify right side
    289,609.80x = 39,069,219,477.06
  5. Step 5: Solve for x
    x = 39,069,219,477.06/289,609.80
  6. Step 6: Final answer
    x = 134,902.96

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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.