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Finding the Fourth Proportional to 1,343.92, 2,016.10 and 419.45

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Solution

The fourth proportional to 1,343.92, 2,016.10 and 419.45 is: 629.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,343.92 : 2,016.10 = 419.45 : x
  2. Step 2: Convert to fraction form
    1,343.92/2,016.10 = 419.45/x
  3. Step 3: Cross multiply
    1,343.92x = 2,016.10 × 419.45
  4. Step 4: Simplify right side
    1,343.92x = 845,657.19
  5. Step 5: Solve for x
    x = 845,657.19/1,343.92
  6. Step 6: Final answer
    x = 629.25

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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.