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Finding the Fourth Proportional to 966.34, 1,448.35 and 445.64

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Solution

The fourth proportional to 966.34, 1,448.35 and 445.64 is: 667.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.34 : 1,448.35 = 445.64 : x
  2. Step 2: Convert to fraction form
    966.34/1,448.35 = 445.64/x
  3. Step 3: Cross multiply
    966.34x = 1,448.35 × 445.64
  4. Step 4: Simplify right side
    966.34x = 645,434.34
  5. Step 5: Solve for x
    x = 645,434.34/966.34
  6. Step 6: Final answer
    x = 667.92

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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.