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Finding the Fourth Proportional to 657.26, 905.96 and 499.38

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Solution

The fourth proportional to 657.26, 905.96 and 499.38 is: 688.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.26 : 905.96 = 499.38 : x
  2. Step 2: Convert to fraction form
    657.26/905.96 = 499.38/x
  3. Step 3: Cross multiply
    657.26x = 905.96 × 499.38
  4. Step 4: Simplify right side
    657.26x = 452,415.81
  5. Step 5: Solve for x
    x = 452,415.81/657.26
  6. Step 6: Final answer
    x = 688.34

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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.