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Finding the Fourth Proportional to 289,231.20, 433,806.80 and 89,688.80

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Solution

The fourth proportional to 289,231.20, 433,806.80 and 89,688.80 is: 134,520.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,231.20 : 433,806.80 = 89,688.80 : x
  2. Step 2: Convert to fraction form
    289,231.20/433,806.80 = 89,688.80/x
  3. Step 3: Cross multiply
    289,231.20x = 433,806.80 × 89,688.80
  4. Step 4: Simplify right side
    289,231.20x = 38,907,611,323.84
  5. Step 5: Solve for x
    x = 38,907,611,323.84/289,231.20
  6. Step 6: Final answer
    x = 134,520.80

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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.