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Finding the Fourth Proportional to 1,774.21, 2,448.39 and 988.33

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Solution

The fourth proportional to 1,774.21, 2,448.39 and 988.33 is: 1,363.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,774.21 : 2,448.39 = 988.33 : x
  2. Step 2: Convert to fraction form
    1,774.21/2,448.39 = 988.33/x
  3. Step 3: Cross multiply
    1,774.21x = 2,448.39 × 988.33
  4. Step 4: Simplify right side
    1,774.21x = 2,419,817.29
  5. Step 5: Solve for x
    x = 2,419,817.29/1,774.21
  6. Step 6: Final answer
    x = 1,363.88

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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.