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Finding the Fourth Proportional to 914.88, 1,372.41 and 668.82

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Solution

The fourth proportional to 914.88, 1,372.41 and 668.82 is: 1,003.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.88 : 1,372.41 = 668.82 : x
  2. Step 2: Convert to fraction form
    914.88/1,372.41 = 668.82/x
  3. Step 3: Cross multiply
    914.88x = 1,372.41 × 668.82
  4. Step 4: Simplify right side
    914.88x = 917,895.26
  5. Step 5: Solve for x
    x = 917,895.26/914.88
  6. Step 6: Final answer
    x = 1,003.30

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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.