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Finding the Fourth Proportional to 205.32, 307.20 and 200.64

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Solution

The fourth proportional to 205.32, 307.20 and 200.64 is: 300.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.32 : 307.20 = 200.64 : x
  2. Step 2: Convert to fraction form
    205.32/307.20 = 200.64/x
  3. Step 3: Cross multiply
    205.32x = 307.20 × 200.64
  4. Step 4: Simplify right side
    205.32x = 61,636.61
  5. Step 5: Solve for x
    x = 61,636.61/205.32
  6. Step 6: Final answer
    x = 300.20

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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.