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Finding the Fourth Proportional to 289,078.56, 433,628.96 and 89,380.96

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Solution

The fourth proportional to 289,078.56, 433,628.96 and 89,380.96 is: 134,074.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,078.56 : 433,628.96 = 89,380.96 : x
  2. Step 2: Convert to fraction form
    289,078.56/433,628.96 = 89,380.96/x
  3. Step 3: Cross multiply
    289,078.56x = 433,628.96 × 89,380.96
  4. Step 4: Simplify right side
    289,078.56x = 38,758,172,728.60
  5. Step 5: Solve for x
    x = 38,758,172,728.60/289,078.56
  6. Step 6: Final answer
    x = 134,074.88

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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.