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Finding the Fourth Proportional to 661.72, 913.26 and 452.11

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Solution

The fourth proportional to 661.72, 913.26 and 452.11 is: 623.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.72 : 913.26 = 452.11 : x
  2. Step 2: Convert to fraction form
    661.72/913.26 = 452.11/x
  3. Step 3: Cross multiply
    661.72x = 913.26 × 452.11
  4. Step 4: Simplify right side
    661.72x = 412,893.98
  5. Step 5: Solve for x
    x = 412,893.98/661.72
  6. Step 6: Final answer
    x = 623.97

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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.