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Finding the Fourth Proportional to 636.66, 956.42 and 451.98

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Solution

The fourth proportional to 636.66, 956.42 and 451.98 is: 678.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.66 : 956.42 = 451.98 : x
  2. Step 2: Convert to fraction form
    636.66/956.42 = 451.98/x
  3. Step 3: Cross multiply
    636.66x = 956.42 × 451.98
  4. Step 4: Simplify right side
    636.66x = 432,276.87
  5. Step 5: Solve for x
    x = 432,276.87/636.66
  6. Step 6: Final answer
    x = 678.98

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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.