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Finding the Fourth Proportional to 664.13, 995.55 and 253.25

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Solution

The fourth proportional to 664.13, 995.55 and 253.25 is: 379.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.13 : 995.55 = 253.25 : x
  2. Step 2: Convert to fraction form
    664.13/995.55 = 253.25/x
  3. Step 3: Cross multiply
    664.13x = 995.55 × 253.25
  4. Step 4: Simplify right side
    664.13x = 252,118.06
  5. Step 5: Solve for x
    x = 252,118.06/664.13
  6. Step 6: Final answer
    x = 379.62

Related Problems

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Half scale
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Double scale
Find fourth proportional to 665.13, 997.05 and 254.25
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.