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Finding the Fourth Proportional to 636.40, 954.83 and 392.64

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Solution

The fourth proportional to 636.40, 954.83 and 392.64 is: 589.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.40 : 954.83 = 392.64 : x
  2. Step 2: Convert to fraction form
    636.40/954.83 = 392.64/x
  3. Step 3: Cross multiply
    636.40x = 954.83 × 392.64
  4. Step 4: Simplify right side
    636.40x = 374,902.49
  5. Step 5: Solve for x
    x = 374,902.49/636.40
  6. Step 6: Final answer
    x = 589.10

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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.