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Finding the Fourth Proportional to 636.67, 953.89 and 453.10

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Solution

The fourth proportional to 636.67, 953.89 and 453.10 is: 678.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.67 : 953.89 = 453.10 : x
  2. Step 2: Convert to fraction form
    636.67/953.89 = 453.10/x
  3. Step 3: Cross multiply
    636.67x = 953.89 × 453.10
  4. Step 4: Simplify right side
    636.67x = 432,205.29
  5. Step 5: Solve for x
    x = 432,205.29/636.67
  6. Step 6: Final answer
    x = 678.86

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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.