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Finding the Fourth Proportional to 695.22, 959.13 and 485.34

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Solution

The fourth proportional to 695.22, 959.13 and 485.34 is: 669.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.22 : 959.13 = 485.34 : x
  2. Step 2: Convert to fraction form
    695.22/959.13 = 485.34/x
  3. Step 3: Cross multiply
    695.22x = 959.13 × 485.34
  4. Step 4: Simplify right side
    695.22x = 465,504.15
  5. Step 5: Solve for x
    x = 465,504.15/695.22
  6. Step 6: Final answer
    x = 669.58

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Double scale
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1.5x scale

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.