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Finding the Fourth Proportional to 290,958.12, 436,435.56 and 74,816.52

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Solution

The fourth proportional to 290,958.12, 436,435.56 and 74,816.52 is: 112,224.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,958.12 : 436,435.56 = 74,816.52 : x
  2. Step 2: Convert to fraction form
    290,958.12/436,435.56 = 74,816.52/x
  3. Step 3: Cross multiply
    290,958.12x = 436,435.56 × 74,816.52
  4. Step 4: Simplify right side
    290,958.12x = 32,652,589,803.45
  5. Step 5: Solve for x
    x = 32,652,589,803.45/290,958.12
  6. Step 6: Final answer
    x = 112,224.36

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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.