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Finding the Fourth Proportional to 1,419.40, 1,958.70 and 798.44

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Solution

The fourth proportional to 1,419.40, 1,958.70 and 798.44 is: 1,101.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.40 : 1,958.70 = 798.44 : x
  2. Step 2: Convert to fraction form
    1,419.40/1,958.70 = 798.44/x
  3. Step 3: Cross multiply
    1,419.40x = 1,958.70 × 798.44
  4. Step 4: Simplify right side
    1,419.40x = 1,563,904.43
  5. Step 5: Solve for x
    x = 1,563,904.43/1,419.40
  6. Step 6: Final answer
    x = 1,101.81

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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.