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Finding the Fourth Proportional to 695.26, 959.48 and 664.11

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Solution

The fourth proportional to 695.26, 959.48 and 664.11 is: 916.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.26 : 959.48 = 664.11 : x
  2. Step 2: Convert to fraction form
    695.26/959.48 = 664.11/x
  3. Step 3: Cross multiply
    695.26x = 959.48 × 664.11
  4. Step 4: Simplify right side
    695.26x = 637,199.43
  5. Step 5: Solve for x
    x = 637,199.43/695.26
  6. Step 6: Final answer
    x = 916.49

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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.