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Finding the Fourth Proportional to 667.36, 919.03 and 665.34

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Solution

The fourth proportional to 667.36, 919.03 and 665.34 is: 916.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.36 : 919.03 = 665.34 : x
  2. Step 2: Convert to fraction form
    667.36/919.03 = 665.34/x
  3. Step 3: Cross multiply
    667.36x = 919.03 × 665.34
  4. Step 4: Simplify right side
    667.36x = 611,467.42
  5. Step 5: Solve for x
    x = 611,467.42/667.36
  6. Step 6: Final answer
    x = 916.25

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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.