Home / 1,150.89-1,724.80-419.78

Finding the Fourth Proportional to 1,150.89, 1,724.80 and 419.78

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Solution

The fourth proportional to 1,150.89, 1,724.80 and 419.78 is: 629.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,150.89 : 1,724.80 = 419.78 : x
  2. Step 2: Convert to fraction form
    1,150.89/1,724.80 = 419.78/x
  3. Step 3: Cross multiply
    1,150.89x = 1,724.80 × 419.78
  4. Step 4: Simplify right side
    1,150.89x = 724,036.54
  5. Step 5: Solve for x
    x = 724,036.54/1,150.89
  6. Step 6: Final answer
    x = 629.11

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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.