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Finding the Fourth Proportional to 290,221.28, 435,499.99 and 121,726.60

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Solution

The fourth proportional to 290,221.28, 435,499.99 and 121,726.60 is: 182,660.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,221.28 : 435,499.99 = 121,726.60 : x
  2. Step 2: Convert to fraction form
    290,221.28/435,499.99 = 121,726.60/x
  3. Step 3: Cross multiply
    290,221.28x = 435,499.99 × 121,726.60
  4. Step 4: Simplify right side
    290,221.28x = 53,011,933,082.73
  5. Step 5: Solve for x
    x = 53,011,933,082.73/290,221.28
  6. Step 6: Final answer
    x = 182,660.39

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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.