Home / 1,320,495.21-1,979,999.24-421,725.69

Finding the Fourth Proportional to 1,320,495.21, 1,979,999.24 and 421,725.69

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Solution

The fourth proportional to 1,320,495.21, 1,979,999.24 and 421,725.69 is: 632,351.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,495.21 : 1,979,999.24 = 421,725.69 : x
  2. Step 2: Convert to fraction form
    1,320,495.21/1,979,999.24 = 421,725.69/x
  3. Step 3: Cross multiply
    1,320,495.21x = 1,979,999.24 × 421,725.69
  4. Step 4: Simplify right side
    1,320,495.21x = 835,016,543,579.85
  5. Step 5: Solve for x
    x = 835,016,543,579.85/1,320,495.21
  6. Step 6: Final answer
    x = 632,351.06

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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.