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Finding the Fourth Proportional to 695.62, 964.87 and 670.68

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Solution

The fourth proportional to 695.62, 964.87 and 670.68 is: 930.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.62 : 964.87 = 670.68 : x
  2. Step 2: Convert to fraction form
    695.62/964.87 = 670.68/x
  3. Step 3: Cross multiply
    695.62x = 964.87 × 670.68
  4. Step 4: Simplify right side
    695.62x = 647,119.01
  5. Step 5: Solve for x
    x = 647,119.01/695.62
  6. Step 6: Final answer
    x = 930.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.