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Finding the Fourth Proportional to 1,408.49, 1,942.48 and 910.64

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Solution

The fourth proportional to 1,408.49, 1,942.48 and 910.64 is: 1,255.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.49 : 1,942.48 = 910.64 : x
  2. Step 2: Convert to fraction form
    1,408.49/1,942.48 = 910.64/x
  3. Step 3: Cross multiply
    1,408.49x = 1,942.48 × 910.64
  4. Step 4: Simplify right side
    1,408.49x = 1,768,905.98
  5. Step 5: Solve for x
    x = 1,768,905.98/1,408.49
  6. Step 6: Final answer
    x = 1,255.89

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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.