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Finding the Fourth Proportional to 290,874.02, 436,320.56 and 80,494.34

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Solution

The fourth proportional to 290,874.02, 436,320.56 and 80,494.34 is: 120,744.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,874.02 : 436,320.56 = 80,494.34 : x
  2. Step 2: Convert to fraction form
    290,874.02/436,320.56 = 80,494.34/x
  3. Step 3: Cross multiply
    290,874.02x = 436,320.56 × 80,494.34
  4. Step 4: Simplify right side
    290,874.02x = 35,121,333,525.26
  5. Step 5: Solve for x
    x = 35,121,333,525.26/290,874.02
  6. Step 6: Final answer
    x = 120,744.14

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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.