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Finding the Fourth Proportional to 290,464.90, 435,697.68 and 90,786.34

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Solution

The fourth proportional to 290,464.90, 435,697.68 and 90,786.34 is: 136,179.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,464.90 : 435,697.68 = 90,786.34 : x
  2. Step 2: Convert to fraction form
    290,464.90/435,697.68 = 90,786.34/x
  3. Step 3: Cross multiply
    290,464.90x = 435,697.68 × 90,786.34
  4. Step 4: Simplify right side
    290,464.90x = 39,555,397,713.69
  5. Step 5: Solve for x
    x = 39,555,397,713.69/290,464.90
  6. Step 6: Final answer
    x = 136,179.61

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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.