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Finding the Fourth Proportional to 206.64, 308.88 and 202.32

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Solution

The fourth proportional to 206.64, 308.88 and 202.32 is: 302.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.64 : 308.88 = 202.32 : x
  2. Step 2: Convert to fraction form
    206.64/308.88 = 202.32/x
  3. Step 3: Cross multiply
    206.64x = 308.88 × 202.32
  4. Step 4: Simplify right side
    206.64x = 62,492.60
  5. Step 5: Solve for x
    x = 62,492.60/206.64
  6. Step 6: Final answer
    x = 302.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.