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Finding the Fourth Proportional to 289,911.54, 434,908.31 and 90,252.08

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Solution

The fourth proportional to 289,911.54, 434,908.31 and 90,252.08 is: 135,390.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,911.54 : 434,908.31 = 90,252.08 : x
  2. Step 2: Convert to fraction form
    289,911.54/434,908.31 = 90,252.08/x
  3. Step 3: Cross multiply
    289,911.54x = 434,908.31 × 90,252.08
  4. Step 4: Simplify right side
    289,911.54x = 39,251,376,960.98
  5. Step 5: Solve for x
    x = 39,251,376,960.98/289,911.54
  6. Step 6: Final answer
    x = 135,390.87

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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.