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Finding the Fourth Proportional to 290,932.80, 436,406.54 and 80,572.56

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Solution

The fourth proportional to 290,932.80, 436,406.54 and 80,572.56 is: 120,860.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,932.80 : 436,406.54 = 80,572.56 : x
  2. Step 2: Convert to fraction form
    290,932.80/436,406.54 = 80,572.56/x
  3. Step 3: Cross multiply
    290,932.80x = 436,406.54 × 80,572.56
  4. Step 4: Simplify right side
    290,932.80x = 35,162,390,089.16
  5. Step 5: Solve for x
    x = 35,162,390,089.16/290,932.80
  6. Step 6: Final answer
    x = 120,860.87

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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.