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Finding the Fourth Proportional to 664.57, 996.10 and 339.25

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Solution

The fourth proportional to 664.57, 996.10 and 339.25 is: 508.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.57 : 996.10 = 339.25 : x
  2. Step 2: Convert to fraction form
    664.57/996.10 = 339.25/x
  3. Step 3: Cross multiply
    664.57x = 996.10 × 339.25
  4. Step 4: Simplify right side
    664.57x = 337,926.93
  5. Step 5: Solve for x
    x = 337,926.93/664.57
  6. Step 6: Final answer
    x = 508.49

Related Problems

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Half scale
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Double scale
Find fourth proportional to 665.57, 997.60 and 340.25
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.