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Finding the Fourth Proportional to 289,639.60, 434,329.80 and 131,786.80

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Solution

The fourth proportional to 289,639.60, 434,329.80 and 131,786.80 is: 197,621.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,639.60 : 434,329.80 = 131,786.80 : x
  2. Step 2: Convert to fraction form
    289,639.60/434,329.80 = 131,786.80/x
  3. Step 3: Cross multiply
    289,639.60x = 434,329.80 × 131,786.80
  4. Step 4: Simplify right side
    289,639.60x = 57,238,934,486.64
  5. Step 5: Solve for x
    x = 57,238,934,486.64/289,639.60
  6. Step 6: Final answer
    x = 197,621.23

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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.