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Finding the Fourth Proportional to 612.20, 918.09 and 201.25

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Solution

The fourth proportional to 612.20, 918.09 and 201.25 is: 301.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.20 : 918.09 = 201.25 : x
  2. Step 2: Convert to fraction form
    612.20/918.09 = 201.25/x
  3. Step 3: Cross multiply
    612.20x = 918.09 × 201.25
  4. Step 4: Simplify right side
    612.20x = 184,765.61
  5. Step 5: Solve for x
    x = 184,765.61/612.20
  6. Step 6: Final answer
    x = 301.81

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.