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Finding the Fourth Proportional to 290,983.76, 436,427.04 and 80,642.96

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Solution

The fourth proportional to 290,983.76, 436,427.04 and 80,642.96 is: 120,950.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,983.76 : 436,427.04 = 80,642.96 : x
  2. Step 2: Convert to fraction form
    290,983.76/436,427.04 = 80,642.96/x
  3. Step 3: Cross multiply
    290,983.76x = 436,427.04 × 80,642.96
  4. Step 4: Simplify right side
    290,983.76x = 35,194,768,329.64
  5. Step 5: Solve for x
    x = 35,194,768,329.64/290,983.76
  6. Step 6: Final answer
    x = 120,950.97

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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.