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Finding the Fourth Proportional to 1,409.44, 2,112.78 and 588.28

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Solution

The fourth proportional to 1,409.44, 2,112.78 and 588.28 is: 881.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.44 : 2,112.78 = 588.28 : x
  2. Step 2: Convert to fraction form
    1,409.44/2,112.78 = 588.28/x
  3. Step 3: Cross multiply
    1,409.44x = 2,112.78 × 588.28
  4. Step 4: Simplify right side
    1,409.44x = 1,242,906.22
  5. Step 5: Solve for x
    x = 1,242,906.22/1,409.44
  6. Step 6: Final answer
    x = 881.84

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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.