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Finding the Fourth Proportional to 612.19, 918.36 and 201.18

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Solution

The fourth proportional to 612.19, 918.36 and 201.18 is: 301.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.19 : 918.36 = 201.18 : x
  2. Step 2: Convert to fraction form
    612.19/918.36 = 201.18/x
  3. Step 3: Cross multiply
    612.19x = 918.36 × 201.18
  4. Step 4: Simplify right side
    612.19x = 184,755.66
  5. Step 5: Solve for x
    x = 184,755.66/612.19
  6. Step 6: Final answer
    x = 301.79

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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.