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Finding the Fourth Proportional to 420,958.44, 580,949.37 and 239,686.20

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Solution

The fourth proportional to 420,958.44, 580,949.37 and 239,686.20 is: 330,782.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,958.44 : 580,949.37 = 239,686.20 : x
  2. Step 2: Convert to fraction form
    420,958.44/580,949.37 = 239,686.20/x
  3. Step 3: Cross multiply
    420,958.44x = 580,949.37 × 239,686.20
  4. Step 4: Simplify right side
    420,958.44x = 139,245,546,887.69
  5. Step 5: Solve for x
    x = 139,245,546,887.69/420,958.44
  6. Step 6: Final answer
    x = 330,782.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.