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Finding the Fourth Proportional to 661.26, 993.26 and 624.51

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Solution

The fourth proportional to 661.26, 993.26 and 624.51 is: 938.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.26 : 993.26 = 624.51 : x
  2. Step 2: Convert to fraction form
    661.26/993.26 = 624.51/x
  3. Step 3: Cross multiply
    661.26x = 993.26 × 624.51
  4. Step 4: Simplify right side
    661.26x = 620,302.36
  5. Step 5: Solve for x
    x = 620,302.36/661.26
  6. Step 6: Final answer
    x = 938.06

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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.