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Finding the Fourth Proportional to 290,970.90, 436,463.64 and 80,610.66

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Solution

The fourth proportional to 290,970.90, 436,463.64 and 80,610.66 is: 120,918.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,970.90 : 436,463.64 = 80,610.66 : x
  2. Step 2: Convert to fraction form
    290,970.90/436,463.64 = 80,610.66/x
  3. Step 3: Cross multiply
    290,970.90x = 436,463.64 × 80,610.66
  4. Step 4: Simplify right side
    290,970.90x = 35,183,622,086.40
  5. Step 5: Solve for x
    x = 35,183,622,086.40/290,970.90
  6. Step 6: Final answer
    x = 120,918.01

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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.