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Finding the Fourth Proportional to 290,107.28, 435,182 and 121,458

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Solution

The fourth proportional to 290,107.28, 435,182 and 121,458 is: 182,195.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,107.28 : 435,182 = 121,458 : x
  2. Step 2: Convert to fraction form
    290,107.28/435,182 = 121,458/x
  3. Step 3: Cross multiply
    290,107.28x = 435,182 × 121,458
  4. Step 4: Simplify right side
    290,107.28x = 52,856,335,356
  5. Step 5: Solve for x
    x = 52,856,335,356/290,107.28
  6. Step 6: Final answer
    x = 182,195.83

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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.