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Finding the Fourth Proportional to 636.40, 954.76 and 203.60

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Solution

The fourth proportional to 636.40, 954.76 and 203.60 is: 305.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.40 : 954.76 = 203.60 : x
  2. Step 2: Convert to fraction form
    636.40/954.76 = 203.60/x
  3. Step 3: Cross multiply
    636.40x = 954.76 × 203.60
  4. Step 4: Simplify right side
    636.40x = 194,389.14
  5. Step 5: Solve for x
    x = 194,389.14/636.40
  6. Step 6: Final answer
    x = 305.45

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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.