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Finding the Fourth Proportional to 289,656.80, 434,517.60 and 89,975.60

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Solution

The fourth proportional to 289,656.80, 434,517.60 and 89,975.60 is: 134,973.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,656.80 : 434,517.60 = 89,975.60 : x
  2. Step 2: Convert to fraction form
    289,656.80/434,517.60 = 89,975.60/x
  3. Step 3: Cross multiply
    289,656.80x = 434,517.60 × 89,975.60
  4. Step 4: Simplify right side
    289,656.80x = 39,095,981,770.56
  5. Step 5: Solve for x
    x = 39,095,981,770.56/289,656.80
  6. Step 6: Final answer
    x = 134,973.46

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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.