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Finding the Fourth Proportional to 289,939.08, 434,950.56 and 90,277.32

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Solution

The fourth proportional to 289,939.08, 434,950.56 and 90,277.32 is: 135,429.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,939.08 : 434,950.56 = 90,277.32 : x
  2. Step 2: Convert to fraction form
    289,939.08/434,950.56 = 90,277.32/x
  3. Step 3: Cross multiply
    289,939.08x = 434,950.56 × 90,277.32
  4. Step 4: Simplify right side
    289,939.08x = 39,266,170,889.30
  5. Step 5: Solve for x
    x = 39,266,170,889.30/289,939.08
  6. Step 6: Final answer
    x = 135,429.04

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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.