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Finding the Fourth Proportional to 695.31, 955.51 and 663.18

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Solution

The fourth proportional to 695.31, 955.51 and 663.18 is: 911.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.31 : 955.51 = 663.18 : x
  2. Step 2: Convert to fraction form
    695.31/955.51 = 663.18/x
  3. Step 3: Cross multiply
    695.31x = 955.51 × 663.18
  4. Step 4: Simplify right side
    695.31x = 633,675.12
  5. Step 5: Solve for x
    x = 633,675.12/695.31
  6. Step 6: Final answer
    x = 911.36

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.