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Finding the Fourth Proportional to 291,239.20, 436,513.20 and 122,759.20

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Solution

The fourth proportional to 291,239.20, 436,513.20 and 122,759.20 is: 183,993.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,239.20 : 436,513.20 = 122,759.20 : x
  2. Step 2: Convert to fraction form
    291,239.20/436,513.20 = 122,759.20/x
  3. Step 3: Cross multiply
    291,239.20x = 436,513.20 × 122,759.20
  4. Step 4: Simplify right side
    291,239.20x = 53,586,011,221.44
  5. Step 5: Solve for x
    x = 53,586,011,221.44/291,239.20
  6. Step 6: Final answer
    x = 183,993.13

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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.