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Finding the Fourth Proportional to 289,138.80, 433,513.80 and 154,225.20

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Solution

The fourth proportional to 289,138.80, 433,513.80 and 154,225.20 is: 231,234.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,138.80 : 433,513.80 = 154,225.20 : x
  2. Step 2: Convert to fraction form
    289,138.80/433,513.80 = 154,225.20/x
  3. Step 3: Cross multiply
    289,138.80x = 433,513.80 × 154,225.20
  4. Step 4: Simplify right side
    289,138.80x = 66,858,752,507.76
  5. Step 5: Solve for x
    x = 66,858,752,507.76/289,138.80
  6. Step 6: Final answer
    x = 231,234.11

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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.