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Finding the Fourth Proportional to 656.88, 985.31 and 200.88

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Solution

The fourth proportional to 656.88, 985.31 and 200.88 is: 301.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.88 : 985.31 = 200.88 : x
  2. Step 2: Convert to fraction form
    656.88/985.31 = 200.88/x
  3. Step 3: Cross multiply
    656.88x = 985.31 × 200.88
  4. Step 4: Simplify right side
    656.88x = 197,929.07
  5. Step 5: Solve for x
    x = 197,929.07/656.88
  6. Step 6: Final answer
    x = 301.32

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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.