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Finding the Fourth Proportional to 812.12, 1,218.18 and 235.00

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Solution

The fourth proportional to 812.12, 1,218.18 and 235.00 is: 352.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    812.12 : 1,218.18 = 235.00 : x
  2. Step 2: Convert to fraction form
    812.12/1,218.18 = 235.00/x
  3. Step 3: Cross multiply
    812.12x = 1,218.18 × 235.00
  4. Step 4: Simplify right side
    812.12x = 286,266.21
  5. Step 5: Solve for x
    x = 286,266.21/812.12
  6. Step 6: Final answer
    x = 352.49

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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.