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Finding the Fourth Proportional to 215.64, 325.08 and 198.36

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Solution

The fourth proportional to 215.64, 325.08 and 198.36 is: 299.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.64 : 325.08 = 198.36 : x
  2. Step 2: Convert to fraction form
    215.64/325.08 = 198.36/x
  3. Step 3: Cross multiply
    215.64x = 325.08 × 198.36
  4. Step 4: Simplify right side
    215.64x = 64,482.87
  5. Step 5: Solve for x
    x = 64,482.87/215.64
  6. Step 6: Final answer
    x = 299.03

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.